The problem with most tractors is that they tend to be short. Short means it gets buried under snow.I live in Indiana where the weather is all over the place and am looking for a sturdy run as well as a coop that can withhold the weight of snow. I've been thinking about a chicken tractor with a coop on the side.
Hoop coops qualify as tractors, and are taller and tend to have a good amount of space. I know a lady up here, in a older part of Alaska, that uses hoop coops. She tarps the top and keeps the front mostly open for ventilation, and it works well for her.
If you are worried about snow weight, just make the roof steep. A steep roof will shed snow.
My duck coop i used thin, partly rotted wood... it has been standing for years now. The key is a steep roof.
Also the problem I've been having is money limitations as well as I can't cement it into the ground because its not my actual property
My last tractor, and last 2 coops, were built for close to free.
I collected materials from the construction trash area of the town dump, collected pallets, and combed through the free pages on Facebook and Craigslist. You could also stop at all construction sites and ask to look through their trash. I also got paint from a painter. He gave me the leftovers from jobs.
I spread it out on my lawn, decided how it would fit together.... and then fit it together
Since you are building stuff on property that isn't yours, I would build in panels that screw together.
My duck house is built that way. Front wall frame, roof frame, and then a table is the back wall. All screwed together.
In Indiana, since from what I understand, you also get crazy heat... I would build a huge super steep roof, as big as you can... then do wire walls.
For winter you can tarp or pallet, or plywood the back end, but for summer it can be a huge aviary breezy coop.