Necesito mas libros de BiggerPockets por favor!

Utilities and Water/Sewer will be dependent on the metering situation as John alluded to.Good points by @Nick M. as well.

Since it is a parent, they are a disqualified person as you mentioned, so even if they had a self directed retirement account, you would be off limits for transacting with it.

If they can only afford 1200 a month but they need 1400 per month and they won't consider going elsewhere than you are going to waste your time.Seller needs to be qualified over the phone as to having enough motivation before booking appointment.In Person: As Brian and the other experienced negotiators oftentimes say, it is important to get in front of these people.  

Is this person a friend?

I know that I am considered a disqualified person as I am a family member with direct lineage.Is it possible for his separate LLC to invest in mine (listing him as a MGR in my LLC - or not), or is it still considered self-dealing or him receiving indirect benefits?

This is obviously not a matter for an amateur real estate person as it requires much knowledge of state laws and local rules of court.

The seller is basically contracting that you have rights to certain outcomes concerning the house, basically, buy or transfer/assign your rights to sell to another person, as long as all the "rules" are adhered. 20 days is long enough for you to perform your due diligence and pass along to another cash buyer. 

Sounds like you need an office person as well. 

Erica M. As