This tool (no affiliation with BiggerPockets) can help your son find properties with assumable loans. 

I’m new to the space but eager to learn from experienced professionals, expand my network, and find opportunities to collaborate. 

How did you find this deal and how did you negotiate it?

Either can work, propstream will be more affordable  but is propstream as good as data tree finding vacant land. i am on propstream looking and cannot seem to find anything decent , and i am looking in areas where i know vacant land is

If you can't find what you're looking for, try the Bigger Pockets Fileplace.

Hi Paul,It’s important to find a single-family home (SFH) turnkey provider with a proven track record of assisting investors like you in executing 1031 exchanges.

Location How did you find this deal and how did you negotiate it?

I'll find out.

I would not renew their lease then find someone who can pay their rent on time and will obey your rules.  

There’s so much to learn here, and I’m sure you’ll find it incredibly helpful.