(The property type, configuration, location and rent range defines the target tenant pool.

I think he either removed the old mount completely or was in a process of adding a new cheaper mount which obviously had different configuration so he had to patch the wall. he is really a type of a person that will slip a dishonesty here and there and I experienced it many times. he would turn the AC to 67 when it was 100 outside and after unit would malfunction would change back to 72 and claim the unit is bad. he would do it when he would go on a trip which he did often is summer. now that he moved out the thermostat is on 73 and it is 100 outside and there is no issues at all. he also had his girlfriend live with him although he claimed he was the only one. he was always very particular about 24 hours notice that is how I know he was doing something he wasn’t supposed to. he is definitely dishonest but he was paying on time and relatively clean. 

@Sydney GriggsI haven't converted to market rate apartments, but I've spent some time on the concept for hotels.Aside from configuration and structural considerations, your biggest issue will be existing tenants and local ordinances.

In ANY configuration in which a bed would sleep 2 people, there had better be two nightstands, or I'm going to be annoyed if I am staying there.  

From where I sit, this Duplex configuration looks hard to sell to a potential tenant. 

In these cases, this is my preferred method.Pros- Great option for tenants without email or who are not tech-savvy- Requires no front end set up from your end as the landlord/property manager- Typically results in more on-time payments since it takes the human error out of bill paying- No fees for the tenant or landlord/property managerCons- Not all financial institutions offer this - Does not allow you to configure late payments, fees, updated rent etc.- Requires slightly more time on the bookkeeping side to ensure the deposit hit your account and sometimes it difficult to tell at first who the deposit is for- Tenant at any time can stop the direct deposit from their end

The overused "alignment of interest" starts to fall apart in some of these configurations where it's basically impossible for the GP to ever lose.

There's more to it than just the building code, including allowed zoning density, required parking, required open space, etc. that you would need to satisfy that may make it impossible to legalize the unit in its current configuration.

I believe they had to do something in the backend that required manual configuration during business hours. 

@Faustin Hooveri would be more concerned about its configuration.