My first tractor was 10'X12' and a monster to move even with a dolly. I've found the 8X8 can be moved by the DW and is way lighter--but sturdy during storms.I have several flat fields, so that shouldn't be an issue. I was just planning on putting them in there as a sort of "free range" substitute while watching them. What do you think the ideal weight should be approximately? Thanks for all the tips!