Those data points would be the size of the property (each unit breakdown, what current rents are, what you are putting down, is there any other income on the property, how much maintenance/repairs need to be done, etc.) 

I am using 5% for vacancy , 10% for capex and 10% for management abs $100 A month for maintenance is this too much ? 

As a general rule of thumb, I want the ability to set aside about 50% of the rent income each month as a reserve for maintenance, capital expenditures, vacancy, taxes, and insurance. 

I would like to thank everyone that has helped me along the way in answering questions and contributing to other posts.The next item on the agenda for us is setting up a software/ process for tenants to submit rents and any maintenance requests that they may have.

I've tried to maintain some of the maintenance out of my own pocket.

Yeah, that 13% includes finder's fee, maintenance, management etc... 

It does the accounting as well as a variety of other things like leasing, maintenance, etc. 

It was a very bad situation and I know that I am currently below the market rent and the tenants that I have now have maintenance requests every month that are ruining my cash flow.

For the pool, I would have a company maintenance it.

You will also learn management and maintenance or at least build up a reliable source of folks to trust for those endeavors.