But getting a patent, especially a software patent, is expensive and time consuming. 

Those costs get passed to the end consumer. 

Do I go through one property by one property (will be extremely time consuming to physically inspect all the properties since they spread all over the Bay Area - and that I'm still working full-time at my current job - and make each offer one by one? 

Germany, Nordic, & Japanese 5yr rates going negative recently… The bonus in gas prices for consumers in US is a fall in income for resource-rich countries in latin America, Africa, & Australia facing lower commodity prices across the board.

And their inspection process can be rigorous and time consuming.  

Can you do pool maintenance yourself (its not that hard or time consuming)?  

They also do complete remarketing/sales/contracting/closing and loan service of resales to consumers, all "as-is", at roughly 2.5 times the purchase price.

Tom,  I know you are busy with your "other business" but consider that you may be overestimating how time consuming it is to manage rentals on a monthly basis.  

To get licensed in another state as a broker is still a process and time consuming.

Although, this method is more time consuming compared to a ton of yellow letters so I just reserve it for the ones I am really interested in.