Looking to invest in a few properties over the next 5-10 years and want to get a sense for tenants, common issues, etc.

Common rookie mistakes can impact your property value, income, time, and sanity.

Is 21,000 common for these jobs?

I have doubts about his experience in RE, which I believe may be common among CFP. 

Does anyone know of a site or common place to meet investors and rehabbers to make a deal with.

And 5yr is rather common also.

Are these common now?

Well said Jordan, it's not as common in this market to have an ADU but there are some out there.

However, these are the ones most commonly used:Five-of-Ten-Year Test: You must have materially participated in the activity for any five of the past ten years.500-Hour Test: You must have materially participated in the activity or activities for 500 hours in the current tax year.Step 3: Calculation your participation hoursEnsure you are tracking your participation hours.

I enjoy helping new investors avoid common pitfalls and use loopholes to build their REI portfolio.