I stumbled across this thread whilst looking for something else, but thought I'd offer some advice based on personal experience, which other may find useful.
Firstly, as Alex mentioned, get yourself a decent pressure-washing unit.
It's easy to be tempted to save money when starting out, and opt for one of the high-end "domestic" pressure washers, but unless you want to limit yourself to fairly simple cleaning tasks, you are far better off investing in a higher-powered "commercial" grade pressure washer.
There are no hard values, in terms of minimum specification for a pressure washer, however I'd personally recommend investing in one that is higher than the following:
- Minimum 190 bar/2760 psi pressure
- 12 litres per minute flow-rate.
When we started out, we invested in a Brian Nixon "Site-master" hot water pressure washer. In terms of spec, it outputs 3500 PSI from Vanguard 16 HP petrol engine, at 15 litres per minute, and also heats water up to 140C. It was pretty expensive, but we wanted to be able to cover almost any job, and it has the added benefit of being completely self-contained (no electricity needed as it runs off petrol and started with a car battery, and you can connect two trigger gun lances to it, which meant we could work in pairs to get jobs done quicker.
We rigged out a Fiat Ducato LWB van with the Nixon pressure washer and a 1000 litre baffled water tank, so that the unit was fully portable, but to get yourself started you don't really need any of that.
Having had a quick search on eBay, there are lots of pressure washers out there that would be ideal for an individual to get started. I cant comment on every manufacturer, but the SIP, Sealey, Kiam, Draper units are all pretty good, and can be purchased for under £1000. I cant comment on the top-end Karcher pressure-washers as I dont have any experience with the commercial-grade ones, but as I said before, I would steer clear of the domestic grade units as they simply wont provide you with the power you would need.
In terms of water supply, if your budget will stretch, then you should ideally provide your own water so that you are not limited to locations and customers where a water-feed is provided, however some of the portable devices can be feed directly from a water tap feed, so providing you speak with the customer it shouldnt be an issue. You should also ensure you have the right set of connectors for your hoses, so you can cover all bases when connecting up to different feeds. One option is to provide a discount to customers who are willing to provide a water feed. I should also state that some insurance providers of van insurance may want to know if you are carrying a water-tank, which may affect your premium.
In terms of accessories and other equipment, get yourself some water-proof clothing. I personally recommend gore-tex clothing as it is waterproof but breathable. It is more expensive than basic clothing, but if you are wearing it day-in, day-out, its worth investing in. Also get yourself some decent gloves, boots and a face-guard. I would also recommend getting some caution slippery surface A-boards to put up when working.
In terms of marketing, I still feel there is a good market for leaflet distribution. If you can do the distribution yourself, thats even better, as you can look out for driveways that already look grubby in your local area, and pop a leaflet through the door. Get yourself a decent company logo drawn up and some vehicle livery with your contact details. As a tip, Id also recommend investing in a website. If you have little experience of website design, then I would suggest the following.
1. Visit somewhere like 1and1 and buy a domain name with hosting. This should cost you no more than £70 per year.
2. Once purchased, get a web designer to make you a website. I recommend a website called Freelancer.com where various web-designers will bid on your project. You can look at their feedback and decide if previous web designs theyve made are to your taste. This should cost less than £150 for something decent. You also have the added benefit of working with the web designer (usually by email or Skype they keep the costs down by outsourcing from India & Asia, but dont worry, your web design point of contact will always speak English) to ensure you get exactly what you want, and you only pay once completely satisfied.
3. Get yourself some business cards made up and give them out to as many people as possible.
4. Get friends and relatives to post a little advertisement on their Facebook pages and twitter accounts to further spread the service you offer.
Again, there is a temptation to save money and cut corners with this, but I personally think it looks pretty amateurish when a company has a really bad web-site and worse still, when they have a personal Hotmail or gmail email address It gives the impression that they've invested about 5 minutes of their time in their business.
In terms of actually providing the surface, do your homework before pulling out the pressure-washing lance and spraying! Its important to remember that the surface you are cleaning, dictates the pressure requirements from the washer. For example, concrete will withstand far higher flow rates than wooden decking! Im not going to type up every variation of flow rate and sealant and treatment as Ill be typing all afternoon, but Id highly recommend taking a look at the SmartSeal website, which provides a wide range of sealers and treatments for various surface types.
You could also invest in a pressure-washing training course, which will provide information on things like law regulation (e.g. control of noise at work regulation 2005), Risk Assessments, Health and Safety, Hazards when using pressure washing equipment, first aid, etc.
Other things to note remember that you will need public liability insurance.
Thats all I can think of at the moment, but if feel free to PM me if you have any questions on anything I havent covered.
Best of luck to anyone thinking of getting into the business!