I built a portfolio of 27 units in WI over the past 4 years. Well actually I just sold one of my small MF's (a 5 unit) so the portfolio is now 22 plus cash.
I absolutely would NOT choose the the small MF route and particularly if you are out of state. Do it and my bet is that it will be your last RE investment.
Why do I say this?
Well I have direct experience in both areas - of the 22 doors I hold all are duplexes except 2 triplexes and 1 fourplex. Without question all the duplexes are easier to manage and as a group easier collectively than the time drain and issues I have faced on the larger properties.
I will go as far as stating that the duplex space is ideal for the beginner investor (think smaller bites, diversification). This is because you do get an economy over a SF (same roof, same systems, one insurance policy, tax bill is spread) but by and large the tenants will treat this place as their own. I seriously think that this effect is limited to SF and duplexes beyond that you will face what is called the "tragedy of the commons". Now that is a fancy political/economic term for the fact that tenants in small MF's tend to have less invested in the place as their home and tend to be more casual in their interactions with their fellow tenants and your property. They feel more anonymous and have deniability. Well you can police the stuff that will happen, put up cameras, drive there more, become brilliant at property management, but you will see them litter the place more, leave busted up cars there more, stuff on the curb (fines), make more noise, be more destructive. Buy you small MF and mark these words.
BTW with your numbers you are unlikely to buy a decent MF in a decent sized (population wise) area in WI ... although maybe I'll sell you mine ... ;)
Mostly the small MF's are a no man's land in my view - picked over by anyone who has transitioned from small landlord to larger player. Also known on the inside by all the commercial brokers who are just waiting to unload marginal properties on new guys and of no interest to major players.
Also you will get killed if you try to do any of this remote.
In my case I am delighted with my duplex portfolio and and now gearing up my "handy" lawn guy to be legs on the ground as I think of my next move - which will be to blow past the small marginals MF's into something boutique, but bigger ... very hard to do.
Good luck.