My first property is in Warner Robins GA.

I'd keep an eye on ancillary properties that become available. 

If you do the deal, ensure you have your property taxes set aside, because with seller financing there is not an impound process to handle the taxes and insurance. 

I would be willing to take an offer on the property in its current state so you could configure the construction any way you wish.

There is a lot to consider before you buy your first property.  

I previously owned rental property but sold them and am now looking to get back into real estate investing.

Similarly, if you put several Class D tenants in a Class A 4-plex, what do you think will happen to the property?

We don't directly manage properties.

Generally - the depreciation on the structure, mortgage interest, property taxes, repairs & maintenance, insurance, property manager, utilities, vehicle expenses (mileage), professional fees (reports/CPA), home office (office supplies, percentage of utilities, continuing education).

That's simply not true.