Yes, I was offered a couple of software programs for lead generation and tracking that were an up sale. 

Or there might be online retail or other businesses with low startup costs (a good book to read on low cost business ideas is "The $100 Startup" by Chris Guillebeau). 

There are free amortization calculators that you can find online that are free to use. 

@Trae JonesThere are online tools that calculate costs based on area

I took a check one time, because I happened to be at the property and was going to the very bank that the tenant was on their way to for the deposit. 75% of our tenants pay electronically online, and the remaining 25% go to a local bank where we have a tenant access account set up and make their deposit that way.

Hi @Steve Tse, I would recommend searching online (or through your HELOC lender) for a HELOC Amortization Calculator, and plugging in this information.

@Stanley Russell I'd start with self-education through the plethora of free resources online.

It's a property management software, typically used by professional companies.

Do your research--look for comparable listings in the area online, talk to neighbors, call real estate agents, etc.

I've had such a terrible time with all this, that I just created my own software to solve the problem.