VA loan on Manufactured home with land/foundation

Hi,

I'm looking to help my sister find a lender for a home she's buying. They are looking fire a VA loan on a manufactured home on a permanent block foundation on 2 acres in Pennsylvania. They were pre- approved through quicken for 2.5% but they would not finance this home since it is manufactured. The alternative they found is offering 3.75% which seems a little high.

thanks in advance