I have experience with cellular concrete in a commercial application as mass-backfill (15,000 cubic yards) for a newly constructed building where existing soil bearing pressures were poor.

Do you have soils reports ?

Once you start seeing large rotten areas that an inspector notes and a seller discloses, there's usually more rot underneath the visible rot that needs to be addressed.

Just did a phase 2 recently with drilling and water/soil sampling it ran $6k.

One thing they consider when insurance companies calculate the cost to rebuild is also everything that will go into the preparation before hand, ie; demolition costs, soil decontamination, permits, planning etc.

@Zachary Scott IMO, I believe this could be pretty subjective but I think it would depend on your comfort level and risk avoidance regarding certain things, e.g. rancher on a waterfront lagoon in terms of flooding issues, age of the home and potential termite issues resulting in structural damage, roof condition and what could be underneath of it from leaks.

It's a pier and beam foundation with sufficient crawlspace underneath.

Soil and slope are great for wine grapes, but from other conversations we've had, we've been told it's not worth the huge investment for grapes unless you're doing the whole winery thing and producing your own label, etc.

Sometimes they put lipstick on a pig and you are stuck with cast iron or steel pipes underneath.

On some pier and beam houses that stay wet underneath you may have issues with expansion and contraction under the subfloor.