Geoff,
One caution with self-employed health ins coverage. Assuming one does not carry workmans compensation, or you have elected to opt out of work/comp as is permitted in most states, you then have a real dilemma. With an ordinary health or major med plan you have no coverage if injured on the job. I have never seen this little-known fact on any BBS, which leads me to believe this will come as a surprise. The assumption is that you have work comp and most health plans have this stipulation. For a powerwasher this is a major gap. Could bankrupt you. One carrier which does cover occupational injury is Alliance, underwritten by MidWest National Life. There may be others, but this is the only one with which I am familiar.
Richard