He will give you a bid based on configuration of building

(ok fine I'll admit I like it a lot) Building 2 miles away is built in 1850, has additions in every direction configured like a circus fun house, 1 unit of land, $156/sqft, 0.55%erBuilding 4 miles away is built in 1900, half renovated, 0.5 units of land, $199/sqft, 0.60%erBuilding 0 miles away is built in 2019, no funny stuff, 2.5 units of land, $204/sqft, 0.64%erSo I'm starting to think it's worth the price.

As Austin runs out of space for inventory, developers are getting more creative with home and lot configuration."

Until you get confirmation from him do not move forward on purchase.In your situation the value of the property is only based on the existing configuration.

What size and configuration are you seeing in your market for dedicated single family residential and duplex new construction?   

., Here's what I would argue in court: you (as the experienced, knowledgeable house flipper) knew or should have known that the HVAC unit was incorrectly sized or that the venting was incorrect or that the age of the home required a different configuration. 

Checked zillow for rents in the zip code for similar configuration and seeing $3200 and $2300 rents for the area.

Why wouldn't you do value-add work on the units configured as they are?

Usually one tenant gets the basement if there is one, but the other units are just configured adjacently to eachother with separate entry and exit per unit.Example I run into often: A property that was converted from SFR to duplex without permitting in 1950 was not enforced as a violation of code due to cities needing more housing supply for returning WW2 veterans.

Not to say I wouldn't be open to the idea but visually I just cant see a configuration that gives the current rent price I'm shooting for besides the duplex model.