US Documentation for UK boat?
I did the documentation on my last two boats myself; in my opinion, it is not so complicated that one needs to pay alot for someone to compile the documents you provide. In any case, your first stop should be the National Vessel Documentation Web Sitte. The USCG likes you to use its forms and I have found that the process goes alot smoother if you use their bill of sale, for example. The procedures are outlined quite well in the documentation package. Good luck.