As @Richard Dale-Mesaros points out, It's tough to know who to talk to first.I've been a software engineer for a long time.

Mailchimp or any other email marketing software.

Hello Bigger Pockets,Can anyone give me some advice on what the best property management software that is out there.

My husband should be able to quit his FT job as a software engineer at the end of this year and we will have successfully replaced his income with our investments. 

Notcied the Fannie Mae Green program - very cool, anything interesteing come out of the energy and water audit?  

.#4 Compile Your Prices into a Spreadsheet or Estimating SoftwareOnce you start to get a better understanding of Labor and Material costs you will want to store this data into a spreadsheet or software that you can use to help you streamline the estimating process.The Book on Estimating Rehab Costs comes with a spreadsheet that you can use to help you populate your own database of labor pricing and material pricing.

Checklists will also be your friend.Other people have scaled to project management software, but I haven't taken that leap.

I’m thinking either through specialized software or just Google forms and PayPal. 

For property management software, I recommend trying Cozy since it is free and you can screen tenants, collect payments online, and do background and credit check.Another thing to keep in mind is to find a property where you can get low turnover or if you get high turnover you can quickly get a tenant in.

I am looking at paid software programs like Buildium or QuickBooks as a possible solution.For some background, I self-manage 10 units comprised of 3 houses, 1 duplex, and 5 condos.