That last question is the one that really matters.When you leverage with a Roth IRA, there is a small tax that applies to the percentage of the income derived from the non-IRA capital used in the transaction. 

Martin, I actually did some quick mental math and derived a new "rule" to answer someone's question on the fly. 1% rule, 50% rule, all these rules, now there's a new one.

Corey,You can use SD IRA to flip properties but you need to be aware of the potential tax consequences when income is derived from an active business (flip):https://www.biggerpockets.com/blogs/2810/54795-usi...You can't rely on your personal funds or any personal contribution, the IRA must be in the position to handle this deal on it's own, or with another partner or sponsor who is not a "Disqualified Person".If you are to do this deal in your personal name, you can't rely on your retirement funds, unless you utilize 401k loan option as Brian suggested. 

It is typical in MLS to note the derivation of square footage.

If you are doing business in the State of Michigan, they have primary interest to tax income derived from the State of Michigan. 

slide=1"The evolution in driverless technology will change how we use our roadways, public transport, parking lots and gas stations—and in turn this will fundamentally affect what assets perform well.Firstly, driverless cars will change the importance of location, which is the derivative of transportation.

In math terms (cause I like math), good money is made by investing where the first derivative is positive... and real money is made when the second derivative is positive too.So we don't get stuck on the tired "appreciation vs cash flow" or "CA vs Midwest" topic, I'll take a concrete non-RE example.  

The appraised value should have been derived from the income the property is currently producing (NOI) divided by the Cap Rate for properties of similar types in that area. 

Absolutely you should calculate it and understand the impact to your cash flow.Here is another calculation I would encourage you to do:Take your current cash flow and divide by your equity in the house to derive your return on equity (ROE)Compare that to your future cash flow and future equity to figure out your ROE after refinancingIn most cases you will find that your ROE goes UP through a cash-out refi. 

Being that I am an FHA buyer in a cash derived market, who’s to say I can’t use these guys to get a property, rent it for a year, and have that property under a right to purchase agreement down the road?