After all, you'll likely be signing a full-recourse loan. 

I signed up for them. 

I say to multiple applicants, I've got several others also pending, I do require if approved full deposit and lease signed within 36 hours. so if that doesn't get completed I take the next person qualified in line. 

The seller actually LISTED the house after he signed with me.

For example a management/parent company entity or does this open me up for exposure since the lease would be signed with Parent Entity LLC. 

An agent will give you interested people and you choose who to sign a lease with.

I had tenants sign a credit authorization form, sent an invoice each month and used my Square account which direct deposited into my account within 24 hrs

In my area I have seen an obvious increase in signs being posted through out the city saying they will buy houses fast and with cash. 1) Does this mean that my area is becoming a "hot" market?

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final underwriting can unearth a host of last minute conditions The CD is signed 3 days before closing so maybe you left a day earlier  But never hurts to ask