Have an attorney review the language of any contract you are signing/being assigned, to look for potential traps.

Now I signed up for a PRO account (does that make me automatically serious?

After driving by this FSBO (classic red and white sign in the yard) 15-20 times on my way to the jobsite, we finally looked into it and saw it was a double.

And if they wanted out of their lease, I would attempt to find a replacement asap, while letting them know the  unit is still habitable and they are responsible for rent until somebody new signs a lease. 

The list isn't important anyway.B - The process you are following, doing what I am assuming is a Sandwich Lease Option is as follows:   1 - Gain control of the property by signing a lease agreement, and an Option agreement (they are 2 separate agreements, and should NEVER be a single agreement...and never include references from one to the other) in the name of an LLC (you).   2 - Sub lease to the tenant (buyer).   3 - Sell an Option on your LLC to the Tenant/Buyer.   4 - When the Tenant/Buyer exercises their Option, they are buying the LLC.   5 - The Tenant/Buyer now owns the LLC, and all its assets...which include the Option to buy the property.   6 - In the end, the Seller never changes, and the buyer never changes. 

As soon as I've got a project done, tenants in place, and leases signed I'll just provide them to my lender and get financing immediately.

We posted bandit signs, put business cards around places, and marketed on FB.

Screening is very fast and complete - I can elect to accept CC and set the convenience fee (I do charge a tad above costs), and I find its pretty easy to reconcile a tenants payment via "serial number" or transaction ID reported to the bank with both Rentec accounting AND quickbooks - albeit Quickbooks is still manual for me (you can export from Rentec to Quickbooks via CSV... havent got that far along yet.We literally just completed several rehabs (meaning LOTS of expense), so seeing rents come in quickly and accurately is a relief for a change!

A seller we had sent a offer to has sent us back a filled out but not signed contract for $6,500 less than what we offered for the property.

The primary way around this is to buy with cash and do a “delayed finance” transaction, which is done under the 6 month mark