I would guesstimate that annual revenue is just below or around the million dollar mark with a labor percentage around the mid 20's!

You will likely need to eventually buy another property within the 5 year mark as it is likely hard to justify spending 750 hours on one property(Duplex in a given year.750 hours divided by 52 weeks is about 14.5 hours a week.

Common fees will include a set-up fee, a leasing fee for each turnover or a lease renewal fee, marking up maintenance, retaining late fees, and more.

And mark these mother-truckers up, they are paying for the convenience... providing you aren't somehow preventing them from buying the stuff themselves beforehand (the way movie theaters do), it's not at all immoral. 

Common fees will include a set-up fee, a leasing fee for each turnover or a lease renewal fee, marking up maintenance, retaining late fees, and more.

@Mark Adams,I know of Charter Financial, but I don't have first-hand experience. 

With my limited experience explained, here's the situation.I have ear marked a good amount to start real estate investing.

Then, sell around the 7-10-year mark for the big exit to calculate the 15% IRR.

Common fees will include a set-up fee, leasing fee for each turnover or a lease renewal fee, marking up maintenance, retaining late fees, and more.

I would consider looking for a 2-4 unit so you can at least occupy (1) unit and collect rent on the other unit(s) and at the 6 month mark evaluate your LTV and situation.