I will say this about the cracks in the concrete. Depending on when the house was built, there isn’t rebar or wire in the floors. Rebar in the footings, yes, 2 4’s or 1 size 5. Prior to a couple years ago, 2500 psi concrete was used. 3000 is now required. Unless it’s a post tension slab, I have never seen wire in a slab, except for what I’ve done. Compaction of soil here is a joke, meaning none. You will find cracks in damn near every house you look at, some worse than others. Depends on what the base is, the pour was made on. I will say this too, the building here as opposed to where myself or you’re from, is atrocious. Just to let you know what to expect, looking here.