,...and of course the dreaded sales tax...unless you document it...cheaper..but kind of a pain...
It seems like you are suggesting that documenting a boat with the USCG will allow one to be exempt from sales tax. That is not the case.
It isn't that hard either. File some paperwork and wait. The only pressure may be the time you are essentially unregistered/documented, but you just carry a copy of your application, which would suffice. Then, when your doc arrives, you must have the name and hailport properly displayed.
Congrats on getting aboard. Sounds like it has been everything you hoped for.