I haven't sold below an IRR of 20% yet and I haven't only been investing since 2010 like half the podcast guests. 

Probably half of our roofs are under 10 years old but a few are 20 or more.

What an appraiser wants to see are three properties that are similar, that are within half a mile to a mile of the subject property that have sold in the last 3 months to 6 months.Sometimes it can help to locate some properties to suggest to the appraiser but it is up to the appraiser whether to use them or not. 

I have a 10000 sq ft house half way built about to be under contract.

Even in the Bay Area you should be able to get the 1% rule on a duplex and you aren't even at a half percent.

She didn't want to pay the 3% commission(half for buyer's agent).

I'm seeing a lot of half-condos and the like for sale though.

Has moved half his property inventory over to this ( around 18 houses) and said after a few years will look to sell the notes of the performing assets.Not sure if anyone else does this, but seems to be a pretty good idea.

@Stanford GravesI’ve had to use the zero interest cc loans for a year and a half to snag two properties.

Half the cost is labor and if you are doing this long enough you realize that quality materials are cheaper over time, because you install them once and not twice.