You will probably run into some issues and need to budget for that.You budgeted 5k for unforeseen expenses on a 4000sft home.

Here's some online software options that you commonly see recommended on BiggerPockets.

Is there debt on the property or are you doing all cash?

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560 (almost 30% probability of default), little to no good tradelines, lots of collections & chargeoffs, recent evictions.

I am changing the locks over on all of my units at each turnover.

It's great that you're focused on saving and educating yourself before diving into real estate.

I saw once where a developer gave the buyer a pass on paying HOA fees till a house was built on a lot. 

Look at all of the losses you can count against your rental income.Now look at line 18.Line 18 is usually:(Value of your property) - (Land value) / 27.5 years.

However if you had done a warranty deed (or a special warranty deed if you still have a mortgage on it) instead, your LLC has a claim against you for the issue on the title, and you in turn can go back to your initial title insurance to fix it.Some title insurance will allow to transfer the coverage to an LLC that you own 100%, but not all of them do or they may require an additional fee.

Happy to jump on a call sometime and talk through these things and perhaps help narrow it down.