Raising the house sounds easy , it isnt and will require alot of
equipment, even special foundations for the jacks. Leveling it off can
be done with screw jacks slowly, maybe 2" a month but your doors and
windows wont work right and windows wont work at all again. I dug out my
basement and put in foundation walls, For the sill to house in areas I
just cut up screw jacks to be 6" and put one in every few feet for the
house to foundation connection and used wood in areas. You could get it
up a bit higher then your decided on height and custom plane your sill
to foundation wood to just fit in and lower the house. But raising the
whole house is a much harder job.