You've accomplished quite a lot and now have the luxury of optionality.

Is it worth spending more (10-15 cents per record) on a high-end service vs. more affordable options like DealMachine with its unlimited skiptracing?

I've never heard of DSCR, so I'll look into that option.

What are my options to hold them accountable or recover some of the losses?

I would be interested in running some number and see what is my best option.

We also have fix and rent options for properties in need of a little TLC.

Is Zillow sufficient, or are there better options?

. - This made it relatively easy to refinance or do a HELOC to tap the equity created by the appreciation, combined with your original down payment equity and any improvements you did to raise the value.Real estate is now flat-lining or falling in many markets, making the above mostly impossible.You do still have a few options to chase your goal:1) Buy fixer-uppers that you can fix up yourself and increase the value.- Just check with a knowledgeable & trustworthy agent about what improvements will actually lead to an increase in value that exceeds the funds spent.2) House hack and rent out every other bedroom to generate cash to save up for next purchase!

But no, hard money isn’t your only option.

Could you just do a rent with the option to purchase?