One of the concerns would be, how long would this last until regulations catch on?

These carriers are not profitable in CA and CA laws and regulations do not make it easy to mitigate these financial struggles. 

Problem was it's a common perk for Chinese restaurants to provide lower paid staff with room and board, and without the upstairs apartment, renting an apartment in nearby towns for staff is a problem with rooming house regulations beside a major expense.

Prices there tend to be fairly high so make sure the financials make sense to you.If you're going the townhome route, make sure you fully understand the rules and regulations of that particular community.

She is absolutely crushing multi and ADU multi in all parts of LA and knows the regulations for all of these options

I will be doing my own research on local laws & regulations, but want to do this 100% by the books.

I think you are best served to get the best advice and that is what will make your business work much better than the ones who don't care about the regulations.

For purposes of this Regulation, “apartment building” meansand “apartment house” as defined in LVMC 19.18.020.Effective December 5, 2018, a short-term residential rental may be allowed to operate as a conditional use,provided it meets the following standards:1.

Those enormous tenant buyout amounts were feasible before the 2019 rent regulation act. 

The numbers I’ve been running look really promising from a short-term rental (STR) perspective, and the area seems to have favorable STR regulations—or at least a lack thereof.