i've got a lead on a 5x8 trailer some guy bought from tractor supply with wood decking installed already (and wiring and etc etc).  the only worry i have is, the wheels are 13"... not sure if that will be good enough for a long haul on the highway.  the longest i'd attempt is to like grattan or gingerman which is about 5~6 hrs away. i'm getting mixed replies.  some say you should have at min 14~15" wheels for long distance highway, and some say 13" will be just fine.  either way, i'll get spares and fix a flats and etc. most hauls will be less than 2 hours long on way, so hopefully, it wont be a worry.