Here is a list of why adding a single ADU in single family zoned areas in my CA market is typically a poor RE investment:1) The value added by the ADU addition is often significantly less than the cost of adding the ADU.

Added fencing and power to the garage for garage door openers.

Shame on Google, fishy as hell.

So they permitted the room as a bedroom and do the work through a contractor for $20,000 and now they get more money today due to livable pace added verse a dining room that was not providing as much value as a rental. 

Get a Google number or burner. 

The ad revenue is a small potato piece of the pie.

Adding extra income streams, like charging for utilities or offering laundry services, can also help improve cash flow.

While RentRedi is great for property management, here are some other options to consider:Excel/Google Sheets: A simple, customizable way to track property details, upgrades, expenses, and maintenance.Trello: Good for organizing tasks and progress on specific properties.

I recently added a half bathroom out of existing space in a very high cost market.  

I would make improvements to the property only when doing so would cost less than the value added to the property.