I'm mainly seeking supplemental cash flow so multi-unit properties seem the most obvious to me, but open to other suggestions.

Supplement retirement?

I'd probably do something scrappy like take a large personal loan or hard money loan to supplement your $25k, then buy a distressed property and flip it so that then you have a lot more cash to work with.

Sounds like a good time to open a lead paint abatement company to supplement our rental income....lol

Right now, I'm just looking to supplement my income and save money to enhance my RE porfolio.

@Saj Johnson@Tony ManningI have volunteered at my local Area Housing Authority to help resolve conflicts between tenants and the local Area Housing Authority.Remember the majority of section 8 people do not work.they have the time to research all state rental laws and laws that protect them against discrimination.When I mean time eight hours a day seven days a week they can dedicate themselves to this mission.Know the laws that protect them very thoroughly http://www.disabilityrightsca.org/ and http://drlcenter.org/ and https://www.ada.gov/cguide.htmThe section 8 people you want are the ones that work to supplement their government income.

Maybe you can use the money your earning as teacher to help supplement a marketing plan that will enhance what you are already doing so you can build a bigger network closer to where you live. 

Hello Bigger PocketsMy Wife and I (both 28 yo) are new to investment properties and would like to start by supplementing out income as well as prepare for retirement with buy and hold investments.

Have thought about trying to find a way to leverage web scraping to supplement the land records for additional commercial property data.

I am chasing these leads for my partners to supplement income and learn the business.