Honestly, we've had these sorts of lodging in the Emerald Triangle for over 40 years now, although they don't advertise themselves openly as such. I don't think they would choose to even if pot were legal in California, because of the way it turns so many people off (people like Herman). Personally, I think that stoners make lousy customers to sell anything to after you've sold them some pot. For the most part they have no concept of time, propriety or grace, and they're usually cheap bastards (a la Blitty).
Anybody who thinks they can make bank by offering an ancillary service to stoners that doesn't rely on a lumpsum pricetag upfront is going to find themselves babysitting adults who laugh too much and spend too little. S-faggot-R faces the same problems, they cater to addicts and derelicts and are learning the hard way that it's a -EV business model.
