Bad news and good news. The bad news is that you can not use the FHA Construction Loan program to move a manufactured home in a park to land that you own. At this point I'm not aware of any lender that will do this but you can always give me a call and I'll look.
The good news is that you may be able to trade in your manufactured home and build a new home using this program.
Check out this page of my site to find out how;