Established developers with a history of successful projects are generally safer bets. 

You can use propstream to get the owner name and then use platforms like fastpeoplesearch to get their numbers. 

Are there any turnkey companies/platforms that anyone has found useful to buy a single family rental property?  

I never had issues with any tenants we placed when we used it, and we placed probably 40-50 on that platform before switching out. 

Right now I would imagine you're best bet is a small balance Freddie or fannie loans depending on loan size and location.

They also leverage online platforms like BiggerPockets and local real estate Facebook groups to network and find leads.

It is not based in the US, so some of the language of the templated messages can be a little off, but I think you should tweak your messages to suit your style and property, regardless of the platform you use.

No current liens but these properties have tax deeds, not warranty deeds if that matters.That as-is value is going to make obtaining financing more difficult for sure.Financing options drop off pretty steeply below a certain dollar amount because foreclosure costs for lenders can be significant.Your best bet may be to connect with some local private lenders (local investor meetups/referrals are a good starting point for this) or local banks.

If shown how the platform works and how to best use it, would this make you more inclined to use ChatGPT for work?

You best is bet is usually to match existing.