If like in my case I put up 40k in cash and the seller would not give it back because they would not close.. then yes I sued for performance.. too much money to just let them walk.. 20k later and almost 3 years of litigation that most people don't have the time or money for I won..

The other 10% should NOT be performed by 1st timers.

The same way you would hire a wedding planner, and sign a contract to know that they will perform, and they know that they will be paid for the work they do for you, it's a win/win.

Is it stating that home has specific repairs or stipulations that need to be performed in order to obtain home?

@Justin AbdillaAll of this does make me wonder about FHA, VA and other PMI non performing notes as an investment though.

These two tasks can put you in an advantage of getting off market opportunities.

Where does everyone gather market performance data from?

I would measure your returns based on your invested equity position and see how the same equity would perform in a different property.

I'm assuming by that you mean you would purchase the whole property and perform the repairs using your HELOC.

Don't forget to loose sight of what you are actively doing and the task at home.