(It will take another year or so before I can show a solid rental history on my first rental purchased last year; until then I won't qualify for another mortgage).I started construction on an accessory dwelling unit in my back yard, a carriage house (aka a large shed) that will become a not-so-tiny house.

I know in Central PA they are offering up to 11,000 on closing costs, 1 % on tax stamps, and other perks such as new decks, accessories 1/2 off ect.

Also how much for an accessory dwelling and ask your realtor how much value it would add to the house. 

Much of the staging impact is achieved with accessories.  

This bill would instead require the ordinance for the creation of accessory dwelling units to include the provisions described above [i.e. the new state law] . . .

Permitted an Accessory Dwelling Unit (ADU) by converting the existing 2-car garage and studio (720SF total) built in 1996 with a Certificate of Occupancy.

However, per the Denver Zoning Code (DZC), STRs are accessory to primary residential use, meaning the overall character of theproperty should remain residential.

Growing up in the contracting business, I intend to find something that we can build some equity into immediately, then rent it out to one or possibly two families if the layout allows for an accessory apartment. 

As others have pointed out, zoning can be interesting and may not allow for it to be rented out at all, let alone if you intended to cash flow on the primary dwelling as well as an accessory unit.

Seattle does have a Accessory Dwelling Unit rules; however, it requires that the property owner live in one of the units.