Looks like you’re in Hong Kong based on your tag line.  

I do not do a lot of volume, so it would take me a long time to get a good data set just based on those numbers. 

Gita,At least the way I prefer to do things is to only run accrual based accounting activity on my day to day operations.

So, for OU (open use) they have gone back and forth whether they would or would not allow based on lot size or otherwise a STR in that zoning.  

In addition due to prop 13, the tax base is a fraction of if it sold today.   

We’re property managers based in Redding, CA, and the laws here favor the tenants, making situations like this even trickier.

Based on a quick answer from Perplexity it seems like there would be no issue with you buying the home and collecting passive income, but you may not be allowed to manage it yourself since that is considered active work.

In previous roles, I was responsible for the asset management, capital improvement, repair, and maintenance of an ANG Fighter Base worth over $400M.

@Gary Abrams A cloud based solution would work really well in your scenario of having other family logging in and helping with management. 

Here’s an example of what I've used if they don't qualify based on what's on application.