For example, a lot of people don't know how to look up their future property taxes for Michigan properties.

I'm not partnering with anyone on any RE deals - I don't know these people.

Write or call them and ask if they're interested in selling. 

Even if the ADU adds value close to the cost of adding the ADU, there are other reasons that adding an ADU is often worse than other RE investment option. 

Our average tenant stays 12.5 years, which reduces vacancy (an underappreciated factor) and fixup costs to re-rent properties. 

I was able to do a DSCR loan and re-coop my entire investment.

(It is juts that he is old and wont do this forever and I am being proactive in planning for the future.

Put 70k into this, will likely only recoup half of this in the future.)So, current NW just breached 1MM for the first time!

It's a fine balance between economy and what you would do for oneself, but creating a space that feels like home should be of primary focus.If you're looking for some insight into re-leveraging any investment properties for capital improvements, furnishings, etc, some lenders can utilize AirDnA projections to qualify. 

I'm not sure that someone's past performance in the market will be helpful if you are trying to assess your potential future performance.