You just don't want to bring in people to train folks or do yoga or whatever.

Olympic sized pool, hot tubs, on-site restaurant, yoga, pilates, gym, steam, sauna, and management company to take care of it all.

I hear Goat Yoga is getting pretty popular.

In Reno, NV having an experience at the house like a yoga room, fire pit, pool table, game room, kids play room might be more appealing.

Maybe they will but I haven't seen any independent coffee shops, yoga studios etc opening in those areas, not one, so you may have a long haul unless you open one yourself (which I always thought might be an interesting real estate value add strategy).

I'd be doing that and bringing in yoga instructors...then just sit back and watch.

A family who all want a yoga retreat?

That included the main house about 2000 sq ft, 2 little apartments (2/1 and a 1/1) a groundskeeper quarters and a yoga studio.

My expenses are also lower because gone are the stupid suits I used to have to wear and now my wardrobe is 75% yoga pants.The flexibility is great and challenging. 

Often ADU projects have comps where they compare the ADUs to little office spaces, personal yoga studios, etc.