Air floors must be pressure topped to work as expected, that's 10-12 psi, easy to reinflate on land, once at sea specially at late afternoon will experiment deflation due to temp variation issues, having the Honwave a V medium deep and not a flat deck, keel re infaltion to those pressures is a bit foot, hand pump unconfortable.
If you plan on to inflate/deflate and pack your sib on every outing an air floor would be the way to go. A 350 sib is too short for a 25 horse and 4 passengers, but if wanting better sib engine performance go for a alum panel floor sib 380-420 range. Will perform much better.
Will take more time to assemble/disassemble than the Honwave, other option is to leave it assembled on top a proper trailer including engine sitting on back transom.