Tabs:
It seems to be that you've already decided that you will move.
Repair your land. Can you use some of the $$ for home improvements that can be tied into the expansion soil issue? Ex: An inground pool would help the soil stay put!!
With additional home improvements, you can sell the house for more $$. Granted, your federal gains tax (?) or imputted income, or whatever they call it may be higher, but work out the percentages and see where you give Uncle Sam the least.
Good luck!
-Z-man.