A 28'will do for you but get the heaviest axles
you can get.... 16' wheels mandatory.... if you
go the longer trailer.. 16" MANDATORY ...if you
go 3 axles you will wear tires..but if you blow
a tire its not gonna kill ya.. I built a 43 trailer
with 2 10K axles but the tires are the limiting factor
and I but the heaviest rated you can buy... they last
and I have blown out 1 tire and the other one will hold
it up... I wouldnt want to run a lot of miles but it holds
I didnt want 3 axles for 2 factors... wear and price if
you are on pay roads(and I go on pay roads all the time to
head to Norwalk)... but at 28' you probably wont have
cabinets on the lower... thats about 3' for them
EDIT
I forgot that mine is a fifth wheel and I haul it with
a Dodge CTD