Sounds horribly expensive, there goes my cap rate (but is that typical and all part of the BRRRR cost?)

Property Condition & Amenities: it’s important to, “Maintain to the Neighborhood.”Key metrics for each Property Class:Class A Properties:Tenant Pool: Majority of FICO scores 680+, no convictions/evictions in last 7 years.Tenant Default: 0-5% probability of eviction or early lease termination.Section 8: Class A rents are too high and won’t be approved.Vacancies: 5-10%, depending on market conditions.Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Class B Properties:Tenant Pool: Majority of FICO scores 620-680, some blemishes, no convictions/evictions in last 5 years.Tenant Default: 5-10% probability of eviction or early lease termination.Vacancies: 10-15%, depending on market conditions.Cashflow vs Appreciation: Typically, 1-3 years for positive cashflow, balanced amounts of relative rent & value appreciation.Section 8: Class B rents are usually too high for the Section 8 program.Class C Properties:Tenant Pool: Majority of FICO scores 560-620, many blemishes, but should have no convictions/evictions in last 3 years.

New investors typically have no idea how much the true expenses are to hold rentals.

It can typically be underwritten like any other rental property, just with the expectation there are going to be extra costs involved to split the lot, but that's where you are creating value.  

What's the typical best practice here?

Is the income approach for appraisal typically used, since you'll be renting out all units?

Property Condition & Amenities: it’s important to, “Maintain to the Neighborhood.”Key metrics for each Property Class:Class A Properties:Tenant Pool: Majority of FICO scores 680+, no convictions/evictions in last 7 years.Tenant Default: 0-5% probability of eviction or early lease termination.Section 8: Class A rents are too high and won’t be approved.Vacancies: 5-10%, depending on market conditions.Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Class B Properties:Tenant Pool: Majority of FICO scores 620-680, some blemishes, no convictions/evictions in last 5 years.Tenant Default: 5-10% probability of eviction or early lease termination.Vacancies: 10-15%, depending on market conditions.Cashflow vs Appreciation: Typically, 1-3 years for positive cashflow, balanced amounts of relative rent & value appreciation.Section 8: Class B rents are usually too high for the Section 8 program.Class C Properties:Tenant Pool: Majority of FICO scores 560-620, many blemishes, but should have no convictions/evictions in last 3 years.

Typically, there's at least a $500 per month delta between the estimated mortgage and what the property would seemingly rent for after I move out. 

.- Every owner wants a "volume" discount on these jobs until we explain these jobs typically require several contractors and coordinating timelines can be a nightmare.

Lenders do not typically care about long term value they just look at getting paid while they have the loan.If you buy DG or Dollar Tree stick to strong suburban towns to urban core where dirt has value long term.