hello Seth,
if nothing at the right price pops up and you have access to cheap straw or hay bales (the small rectangular ones) and a few sheets of corrugated iron ,or similar. Then you could make some very cheap temporary pig housing . They should last a season at least , but even if they don't you can just make another with some more bales. Really rubbish stuff can be used, farmers even give this type away .You can also use pig netting in a double row , say about 18"-24" apart , placed in the shape of the house you want to make . Fill the gap between with straw ,pack tightly and cover with either corrugated iron or a few 4"x2"s and old doors or whatever you have , to make the roof. All these ways will last a fair time if you make them well , and can be made for next to nothing . Most of the materials needed could be found on freecycle or even bought very cheaply from a local tip, thats if you don't already have the stuff laying around. Good luck whatever way you go with it though ...
cheers
Russ