Going this route is more involved and that makes it more costly too.

Leverage magnifies return. 3) The effort involved in adding an ADU is comparable or larger than a rehab associated with a BRRRR.

Most value adds involve work   Some require specialized knowledge.Here is a list of why adding ADUs 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.

The easiest of all the thing I've been involved in.

This will allow you to get the sheriff involved immediately.If you are already past the notice period then you will probably have to follow whatever state laws are in place for the notification period and possibly the eviction process.

If you have family get them involved...sell FB marketplace and eBay for a year and they can do that from home.   

Most people don't sell an STR that is making them a ton of money so odds are it could look better, although they could be selling it for other reasons.

I’m weighing two options for our housing situation and would greatly appreciate your advice, given the complexities involved.1.Renovate and Buy Another Property•Invest to renovate our current home adding a bedroom to the house given our family outgrew the house.

I don’t want much if any involvement because I’ll be doing other things.  

You will probably have more of them here than most places so ask them what was involved and how long it took.