Thanks for the info. I'm planning to start looking near the end of the season. At the same time, I do (conceptually) came up with another ideal. The bayliner 170 OB, the only place in package that does not fit my garage door width is the axle. If I can get some kind of dolly that has jack on it, then I can
(1) jack it up,
(2) take off the axle from trailer
(3) dolly into my garage for winter storage
This way, I can still see the boat daily, and need to do this operation twice a year.
Maybe a boat cradle on wheels like this will work.
https://goo.gl/images/3ohkQh
If the trailer has rollers it might be pretty easy to push the boat back onto the cradle with a few guys helping.
then just use the winch to pull it back up on the trailer. Silicone spray on the bunks will let it slide easily