Beyond the bedrock issue, soil conditions can be costly if the property has problematic soils such as too much silt, deep topsoil, or extensive wetlands.You'll also want to know what ordinances are going to affect your budget - things like tap fees, tree ordinances, storm water retention policies, etc.Bottom line is that you have to investigate ordinances, off-site conditions, and on-site conditions before you can even begin to budget your development.

They run my soil tests for me.

Looks like you guys have a lot of port silt loam, which is NOT a very expansive soil.

I don't think the LVP will feel right with carpet underneath and it's not a sound installation practice to have that buffer layer there.

The soil composition had to be tested and cleared before development could begin.

Why buy something that is new with active and confirmed contamination underneath it.

If you take this housing away from these people where do you intend to have them live; in the streets, underneath freeway overpasses? 

Going over maps of known repairs with contractors showed that there were a few houses where people tried to have piers installed and ran out of money before hitting stable soil, others in the hyper local area did have to go to 100+ ft.  

Fire hydrants, sewer, water, road access, electric, flood way or plain, storm pond, storm sewer, setbacks, fencing, soil compaction, lot sizes, etc.3.  

I'm thinking that repairing the plumbing leaks and getting the soil dried out could be a permanent solution.