Hey Aishan, I personally own 12-doors in Detroit and I live in California.

There's no precise figure because no one will understand your STR or market as well as you do- or, as well as you will (with time).

The ideal property would meet the above criteria, AND would have a large yard, or ideally, a detached garage that was a suitable candidate for an ADU construction project (CO now allows ADU construction on most properties), and/or a primary structure that had lots of value-add potential. 

He was there for the inspection and followed me from door to door then I realized why.

Im old school...my cpa is in the building next door and I like doing business face to face.

Garage parking, full privacy fence, and second living area or bonus room would all be needed to get on the higher end of that range.

Walls are priced one way, ceilings another, then you have baseboard, trim and doors. 

I have been able to scale up to 12 doors in 2 years so definitely recommend this area.

Exact words.After asking, “well since I’ve cleared the entire hour could you at least go into detail about what it is you do or the service that you offer?”

Make a list of EVERYTHING you want the broker to do or not do: MLS, staging, photos, web site, preparing teaser descriptions, selecting comps., giving you market guidance, open houses, vetting potential buyers who don't have and don't want representation, contract negotiation, managing/scheduling/attending inspections and surveys, fielding bank requests for information, making sure government paperwork is done, you imagine and write it down and you'll still miss some stuff, but that's okay.