Debt service on this is $2308/mo which seems really high.

Feel free to inquire about their staff qualifications if it's a larger organization.2.

You need to drive short distance on private street and then up ~150’ driveway.  

I'm also in CA (up on the Central Coast).

But to answer your question on how to do DD on a wholesaler/ what to ask a wholesaler: You have to do your DD on the property itself.

Seller is an investor who sells dozens of properties each year (some of them via fsbo) but ultimately give in and choose to let you list b/c they’re having trouble offloading this particular property OR want to spend their time on something else.

Not important to this post, but the well and septic on this lot were unaffected by the fire.  

If so are you sure you’re getting market value for the property if it’s not listed on the MLS.

I have joined a couple of groups on FB, and connected with some other people here.

It sounds like it's not in a very desirable area, based on the price and rents.