A Seller that finances the purchase of one of their rental properties to a buyer occupant can't require a full payment in 3, 5, 7 yrs?

When I bought the house (as a owner occupant) I was told that the system needed to run periodically in the Dallas area to help the foundation.

My question to the rest of the community based on this post is: can you discriminate because of occupation?  

...or, Is there an occupancy requirement, if you purchase a HUD Homepath house?  

(Are they targeting the area; non owner occupants; do they want to do the rehabs or prefer the property be rent ready; do they want the tenant in place; etc.)

I came out of the deal with 15k in equity but in the process I ran into a lot of unforseen issues that resulted in me maxing out my credit cards just to obtain the occupancy permit and to start prepping the house for resale.  

I was looking at listings on Zillow to get a feel for an area, and I saw this one come up:http://www.zillow.com/homedetails/7801-Saint-Fabia...Depending on how much work it needs, it may be a great deal (Rents go for 1100-1400 in that area), but I notice this in the description:"ONLY OWNER OCCUPANTS SINCE THIS IS AN APPROVED NSO SHORT SALE."

.$450,000 asking price3.9% cap rate2,398 square feet buildingGarden low rise100 percent occupancy with rents ranging from 650 to 750 NOI: 17,550New roof and new hvac systems heating and ac Is this a good investment guys?

(A single house, rented per room /w shared kitchen/bath) Typically D or C occupants.

Also, you might need a certificate of occupancy to be able to rent out to a paying "tenant".As a landlord, you also have a duty to make sure your dwelling is safe.