You would have to create an HOA to manage the common area and keep control of that or create a self-managing HOA for the four owners to manage together.

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

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

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

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

It was common back in the day.

It is common for PMs to stick fees into paragraphs throughout the agreement, this is another red flag.

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.

Software is a common question on BiggerPockets.

Looking at pure spreadsheet math and common convention; if you pay down your mortgage you are effectively making that interest rate on your money.