Also, the built in obsolescence which creates a residual income stream for Intuit is a little bit off-putting for a small business person.

Do you just look for investors who want apart of the residual income over a set period of years?

I'm not sure if you've completed a loan application with a lender yet, but one of the things we look at with your pre-approval on a VA loan is your residual income (not just your debt-to-income ratio). 

Also is this on-going contamination or has it stopped and is just residual? 

The space is very valuable to a new dentist that can capitalize on residual business from the dentist that is leaving.  

Your spouse could be sitting on a beach with you one day living on your residual income, or living in the basement of that bad 4-plex you bought . . .

For removing just about any flooring residue, check out bean-e-doo.  

I’m kind of at that point where I’m ready to start using the BRRRR method instead of just flipping and start creating some residual income in my life.

@Karl McGarvey I would start out small to gradually build my capital first, such as a simple 5-10k cosmetic flip or buy and hold to get residual income coming in.

If you are taking monies from residual tenants, you are likely creating a legal lease.