From marketing to plumbing issues to service lines, to showing/marketing the vacancy, etc.This cost 'issue' is compounded by the fact that 3 bedrooms are highly coveted.

AirBnb for example may have more folks seeking luxury amenities with their stay becuase they have been sorta conditioned to expect those things with the AirBnb brand; rather furnish finder you will still find room to room rentals just looking for a private bedroom and bathroom, and that is it.I run a MTR for traveling medical professionals so my basement ADU is packed with the meal prep kitchen appliances and accessories to help with their long 13 hr shifts.

Collier County put out a notice recently that states:"In most Zoning Districts that allow dwelling units, transient lodging (less than 6 months) is not a use that is listed as a permitted, accessory, or conditional use in Ordinance 2004-41, as amended, the Collier County Land Development Code.

I wish other angles to increase housing supply were also being explored in Boston...they started an accessory dwelling unit expansion "pilot" program but i think it only included 2 neighborhoods.

(https://housingtrustsv.org/programs/homeowner-programs/accessory-dwelling-unit-program/)

Besides becoming an expert in this area, I'm a real estate lawyer, which makes it easier for me to understand the laws & zoning codes I'm reading.As far as I know, there is only one County in California where tiny homes are legal as Accessory Dwelling Units (ADU), a unit placed on the property that already has a home on it.

Ideally, even get a property with an extended backyard where I could build a detached accessory dwelling unit (DADU) on the same property.

I love the ability to make a list of items on Amazon and then I just order that same list every single time for the basic accessories - kitchen, bedrooms, and even coffee tables/desks, rugs, etc.  

One alternative is to take the extra step past the house hack and make your own; in DC, Arlington & Montgomery Co it's now legal to create a second, "accessory" unit within most existing houses:https://www.smartergrowth.net/...

I lived there from 2015-2019 and didn't see much opportunity for what I was comfortable with - however, I think a viable option, (albeit hard to find) is to find a Accessory dwelling unit somewhere in Phoenix.