I've been skidding logs with a 12hp garden tractor and a 'junkyard' axle assembly.
To move long timbers from the field to the house lot I use the axle assembly of the tractor's garden cart to support the leading end and my timber cart bungied in place ~2/3+ of the way down.
All my rollers are old steel pipe, either 1" OD galvanized water pipe or 3" ID 3/8" pressure pipe wall which works real well when slipping a timber out of a stack cribbed up on 4x4s.
