We want to get a Vacation Rental Permit for stays under 30 days for ADU but current zoning doesn't allow it.

Its not tricky, it just takes discipline to save $.

PPMG claims "...an average length of stay of 5.3 years

I think the right investor would do 2 units long term one unit short term. this strategy allows you the greatest flexibility. we are also developing an extended stay hotel that's 58 rooms. the size of the average room in that is 216 square feet and rents for a target $80 per night. our development cost per room is 100k per room with hard construction. the smaller you go the more money you make. if I was to suggest anything it would be to focus on the smaller part of the market and on multiple unit dwellings and finding and identifying markets that meet similar numbers. that will probably be midwest markets.

Stay on top of material price trends, and have contingency plans for unexpected costs.

Rent is decently expensive, but whenever I booked the stay, the owner mentioned he was trying to sell the unit.

This helped me yesterday when someone inquired about a stay in October. 

By creating the Texas Stock Exchange, Lee hopes to address the high costs of going and staying public.TXSE closed its initial capital raise at $161 million, which the company claims makes it "the most well-capitalized exchange" to file a registration.

STR stays STR.

Your name and credit would stay with the existing note, which you would keep paying on - ideally yourself with money you receive from the "buyer", because if they don't pay your credit is wrecked and your house is in foreclosure.If you search on here you'll see everyone and their brother looking to do Subto and it's a nightmare unless the buyer has the funds to pay the note off if/when the original lender figures out you don't occupy the property any more and are attempting to do what you want to do, since most loans are going to specify that performance.