Drew, sounds like a solid opportunity with a lot of potential, but definitely some big hurdles to clear upfront.

When searching for clients I usually suggest starting with ones inner circle and good old grass roots marketing. 

I don't know if shifting to MTR could generate greater interest but it doesn't solve the marketability issue and all you are doing is punting the root issue down the road. 

More information is needed for the root causes of your plumbing issues to lay blame.

Because it still livable, and doesn’t have any issues but plumbing in the basement needs to be jetted almost every 1- 2 years because of root issues. 

To match them, I use a formula Sofa: solid color textured pillow (2) + patterned pillow (2) + solid color (2)King bed: 26"x26" pillows (3) + lumbar/body pillow at least 48"L (1) - I'll do a print + a solidQueen Bed: 26"x26" pillows (2) + lumbar pillow 36" (1)Twin/Bunk: 14" x 20" lumbar pillow (1)In outdoor spaces, I keep it simple and match the pillows to the rug.For artificial plants I source from Nearly Natural, Wayfair and Home Depot. 

Aside from grass roots networking, what technology can help me find pre-market deals?

I would say on a rental property that's unrealistic, if it really is an issue on a property, better to address the root cause.

I'm a bit of a nomad who doesn't like to put roots down too deep ;)  

That being said, there’s nothing wrong with investing in blue collar areas but I prefer to invest in the ones that have a higher degree of owner occupancy because the residents of those areas care about where they live and have deeper roots.