What's a good PM software for a part timer?

[Austin H.]

we currently have 4 SFH's and a 9 plex with potential doubling the unit count in the next 6 months. We currently track all financials in a spreadsheet, each house separated by tabs and the 9 plex combined on one time with a breakout by unit. All are under the same LLC. Tax time is a breeze. The system works fine for us now but with the potential of doubling are unit count I want to have a new system in place if needed.

What are some good options out there, and what are the pro's and cons? We both have full time jobs so real time on the move access would be nice to have.