If you can find buildings in areas that attract a mix of A and B class tenants, all the better!

With OSU graduating 6000+ students a year, as the state capitol and with tax incentives attracting big business to Columbus, there are great investment opportunities here.  

I am seeing some 4 units and smaller apartments that are attractive.  

Like attracts like.

Stratford, Bridgeport, West Haven, and New Haven are reasonably close and have some attractive prices

Given the choice between the two, I find that higher quality tenants are more attracted to laminate than to carpet.

While you can get stiffed there are a number of ways of mitigating that.1) You have done this and it is have higher rent which attracts a better class of tenant. 2) Screen well and get quality people3) Use a debiting service to collect rent.

Thanks, @Neal Collins, you're absolutely right: I'll need to do a lot of homework on the mortgages, taxes, potential fees etc. for any given property.Another big reason I'm doing this is that there are a lot of attractive reasons to go from having an external office for my business (which is currently the case) to having an in-home office that would be tax deductible and essentially give me a discount on my house payment.However, another consideration that I must be careful of is that with seller-financing, a seller can sell the house as-is with possibly a huge number of repairs/some deeply fundamental repair needed.

An extra $400 a month is nothing to scoff at.Also with a multi, if one of your tenants move out, you've only lost half of your income, as opposed to all of it.That being said, a SFH seems like it would potentially attract a little higher quality tenants.  

Otherwise you face a stronger possibility of not receiving payment, given the tenants those properties attract (not sure what you're about to close on).There are several groups you can go to that provide housing/utilities assistance besides Richmond Redevelopment who is associated with the GoSection8 website.