Let's say you get the boat for $26k, then spend $4k on the mods... you're up to $30k and still need to buy your motors...
As an alternative, for example, one of these 22' Lifetimer *cabin* boats made in B.C., goes for $37,087 Canadian for the base boat, which is $33,177 US, and they are advertising a special of 10% off the next 5 boats, which would put right back around $30k again... of course you'd have to add for the trailer, but... it's a bigger boat, new, with weather protection, setup the way you want...
See:
http://www.lifetimer.bc.ca/2200%20Cabin%20Models.htm