They do this to avoid recapture (taxed at 100%) upon sale of the home.

I love targeting the houses that need complete rehab, I'm just finishing one now that will be For Sale.

You'd have to payoff the back taxes at the time of the sale.  

I see so many 55+ mobile or prefab homes for sale in the area.

Hello BP,Looking for a 125+ units condos or apartments for sale in DC. 

Occupancy, Preservation, Maintenance and Protection of the Property:Borrower shall occupy, establish, and use the Property as Borrower's principal residence within sixty days after the execution of this Security Instrument (or within sixty days of a later sale or transfer of the Property) and shall continue to occupy the Property as Borrower's principal residence for at least one year after the date of occupancy, unless Lender determines that requirement will cause undue hardship for Borrower, or unless extenuating circumstances exist which are beyond Borrower's control.

I had my mind blown this weekend on a sale that happened.

I have previously purchased and completed the rehab and on-sale of a KCLB property.

We have a website, we are on Google with Adwords, (spent $700 on that last month) we mailed out over 1,500 postcards to vacant houses and houses that are coming up for tax sale, we have an ad on craigslist, and yet no deals. 

REIAs cant get a bit sales pitchy, so be prepared for that.