Dan how hard are they to dig out after freezing in after not being moved for a month?
To be honest, I don’t know. Never had them freeze in. Always have them up on foot long pieces of 4×4 blocks. 2 or 3 to a side. We have a low car Jack that we “pop” it off the blocks with. Jack it up in front, knock out the blocks, set it back down and repeat on the rear. Set it back down and pull away.
Occasionally, the bigger ones don’t want to move after being set back down. Usually due to it being a smaller machine pulling with low traction. But we found that putting a two foot section of 2 or 3 inch pvc about 1/3 of the way back from the pulling side under the skids, it gets going with ease. We do this when we have it jacked up to remove the blocking. Then you are off to the races.
Mind you, I’m only talking about Alumalite houses but I’d guess the same principles would apply to any of the lighter skid houses.