One more note:  rent levels are a function of supply and demand -- rents will go down as more rental units become available. 

If "blighted" areas can be improved, it in essence increases supply, making housing in all desirable areas much more affordable. 

Two things to clarify:If i bought property A, and invested 50k of IRA money with a pre determined interest rate before (say 5%) and created some kind of pre-contractural document, but the rest of the money invested was from my own cash supply can i mix in this way.

If you are having trouble finding duplexes and triplexes due to a lack of supply, try modifying your search to include homes that have a guest suite or in-law suite. 

You will also need to wire innards smoke detector into that new room.  

Supply at no extra charge the following. a.

It's also good to know that FHA just amended their guidelines so that lenders can supply contractors with up to 50% of the cost of the materials from the SOR to accommodate start-up costs, where previously contractors would have to use their own funds to float the startup of the project. 

Wouldn’t this lead to less supply of quality rentals which will drive up costs for purchases and rents?

Same with units on the backside of a building or have to go down stairs to get to.Pay attention to office for that areas saturation levels of inventory per sq ft for lease along with new builds slated and how much of that sq ft is being absorbed in the market (supply versus demand).

If it's between 8-12° difference from the supply vents and what it's calling for on the thermostat, it's good.