to answer your questions....The first property is a 5 unit house with a carriage house in the back. in total theres x4 1bed/1bath units for 750/month i believe they can rent from 850/month. and then theres a 3bed/1bath rented for 1050. and then the carriage house is a 4bed/1.5 bath believed to be able to rent at 1650/month. and yes the supplied information is correct. tenants pay for all utilities except water and sewer. the other is a duplex with x2 1bed/1bath units currently rented for 700/month.

The properties themselves would look no different than any other single family, unless you were building a SFR with an ADU/carriage house (then you might have two kitchens)

I will be upgrading the existing duplex and then converting an old carriage house into a permitted ADU / Tiny Home.

@Ryan Wydler have you checked to see if the garage or carriage house apartment is legal?

Lower mission (Pandosy): mostly carriage homes, very happening place right now but also decently more expensive than other areas.3.

With Denver's primary residence rule, the only truly legal way to rent out a whole space full-time on Airbnb is with a basement apartment or carriage house. 

The other value in that is a garage or carriage house unit for a potential owner-occupied  Your question about what I look for is tough to answer in a short post.

Carriage houses built before then are grandfathered.  2.  

It's what they call a carriage-style unit that includes just under 1,000 square feet on the main floor and about 650-700 square feet of additional living space in the finished basement.

It's like if I went out looking for a horse and carriage IMO.