monkey44 wrote:
If you build it yourself -- HD or Lowe's has half inch plywood too, which is easier to use as it needs no addition face frame except for the door face ... unlike, quarter inch, half inch will glue and nail to itself.
If you build the cabinets yourself, and want some 'regular' cabinet doors, send me a PM and I'll hook you up with a door mfgr ... they will build to exact size and ship direct to you.
While half inch plywood can be used, it IS heavier in weight than framing with 2x2 and 1/4". The OP already is starting out disadvantaged using a HEAVY cargo trailer compared to a RV trailer of same size..
You can even make bunks from 1/4" plywood with proper 2x2 frame that can easily stand 300 lbs laying on it. Don't try that with 1/2" plywood.
Additionally, using plywood only is a recipe for disaster, plywood tends to warp, a lot, if not properly reinforced and braced... Often sheets of plywood already have large warps right from the lumber yard. Making it difficult to make things that are plumb and square.
Been there, done that.