Ftp is right, if you can get away without a gennie its a bonus. A petrol driven vac would be best but a good one has not been developed yet. Its early days for gutter vac development but I am sure equipment will get better. One bid of advise do not under estimate the time to do a job, time to set up, clean and clear away at least an hour on small job. We have min charge of £80 - £ 120 two/three bedroom semi. £120 - £180 4/5 bed. Commerical watch out for the box gutters can be diffcult to clear out shrubs etc.