It's great that you already have a home and potential ADU too since being self-employed in the arts can also have extra hurdles just getting approved for a loan. 

@Art Perkitny thank you so much... can you do the same search for Huntsville and Kansas City Kansas?

Hi All,I found a friend in my martial arts class that has been in real estate for 10 years. 

I have worked on some ideas of mathematical architecture, which in my opinion gives Nobel context and the science behind the art.

And SOMETIMES it's more of an art than a science and becomes less about comps and more about what it's worth to you, do the numbers make sense, and will it appraise.

@Lisa Oliver I put electronic deadbolts on my unit doors. 

If the cleaner wanted an electronic payment I’d be happy to do that too.

Plenty exist for private lenders (which is what seller financing is) and can track payments and am tables and also do automatic electronic withdrawal (ACH debit) which helps improve the likelihood of getting paid promptly each month.

But electronic options don't normally work in those cases. 

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.