Where are you located that there is ony one guy that will do this kind of work, (even if it's wrong)?
I would widen my search area. There's not a building on earth that can't be moved. I would not recomend the guy who did that Pisa tower job!
I would want the whole house on a foundation with vapor barriors and at least a 4' crawl space for access to the plumbing and wireing.
I have a concern about the clay that you mentioned.
Have you tried to dig a hole to see where the water level is? I would do this before I hired someone to put in a foundation only to tell you later that you have a problem.
Whatever you do, forget about putting any dirt around the house.
Hubby has some real concerns about the house being damaged if it is not done properly. I would make sure that woever you hire has insurance and you get a copy of it before they start.
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