If they have not set up a listing appointment with you during that phone call drop off a marketing packet on their doorstep.Door hangersWalk neighborhoods and place a door hanger on everyone’s house.

I'm not sure where your market is but I could help look at land costs. we are trying to educate building to rent or building investment properties as a new strategy to just buying the garbage new builds around the country. this fits on lots as small as 3500 square feet. you'd have to check local zoning but if I had what you had that's what I'd do or at least look into it. 

BUT, if one could solve some tough problems….Look, I hear what posters are saying - and it might NOT be a fit for real estate.  

Recently a duplex came on the market that I am really interested in, it is located in an A neighborhood.

The marketing/advertising firm, aka RE broker, is not the expert in building codes, zoning, structural engineering, neighborhood safety, etc.As a prudent investor, always do your own due diligence or you'll end up being (unitentionally) misguided by a RE broker's information.  

Check with your broker and make sure this fits with your local laws.

We have a 30Y Fixed DSCR product that would likely fit your needs. 

Please do check with HOA on having an STR in that specific neighborhood.

We have many of these in the nice neighborhoods of Chicago and you get easy tenants, rent increases and appreciation.

Im only charging $700 but I could easily get $1000 maybe $1100 considering what other places are going for and my place is nicer, and is in a quieter neighborhood, and has a yard, etc.