The experience was really bad as I was getting 1-2 year old leads to cold call that I knew had a 0% success rate and I do much better generating leads organically on my own.

If the seller isn't responsive, then do like the idea of telling the tenant you tried, and see if they can get some free legal assistance from a tenant resource center.It is a good reminder as closing approaches to ask the seller to keep tenants updated on the pending sale and when ownership is scheduled to change.

I'll shoot you a PM with a link to them, they're free to attend and we'd love to have you!

Yes, I use the free built in Vrbo dynamic pricing and really like it. 

Start with BiggerPockets Ultimate Beginners Guide (free).

Move on to finding a credible/chaos-free tenant.

Feel free to reach out if there’s ever anything I can do for you.

This TDR is a new program that has been in development for 30 years and should ignite into an active free market for credits this coming July 15.

If you’re serious about Detroit, feel free to reach out.

(I have tried AirDNA's free version and have gotten a rough estimate on revenue) Or any other ways to get a solid idea of the potential of the property to show to our potential investors?