Also, consider becoming a USAA recommended agent to help supplement your client base.

What tools would you recommend instead/as a supplement?

Maybe even supplement with a cheap cash for keys.

You never want to supplement a tenants rent out of your pocket.

I used conventional bank financing and some supplemental financing through an employee benefits program.

Before I get too, I would like to start investing into rental properties and create some supplements to my weekly take home so that one day I can get a job thats less physically stressful but still make the money that being a plumber would make me. 

In my houses, I make sure kitchens and baths have all romex circuits (grounded) and then try & add one grounded circuit per room to supplement the ungrounded knob & tube.  

My objective is to create passive income with the initial purpose of supplementing my income and retirement; ultimately replacing it over a 7-10 year period.

The other is not a company and is generally doing it to supplement their primary income, or they could be retired or whatever.

Also - my teenager supplements a lot of his feedings with Ramen.