Are you saying they are requesting to be a certificate holder so they can be alerted when and if your policy changes or is cancelled?

Be as little out of pocket as possible and request for a larger balance to be assumed. 

Many will be busy so don't get bogged down if they reject your request.

I requested quotes from 4 different general contractors and it was way above what I had estimated for the rehab.

I'd request the seller's Schedule E for the property.

Is the only reason for local a high leverage request?

Crickets.....not a single request, inquiry or booking.

@Cathy MalmroseAll else aside, your son is essentially a landlord for this time and he could put together a lease agreement immediately (ideally with the help of an attorney), which outlines a security deposit in case of damages, requires the prior owner to obtain renters insurance, who pays utilities and any daily rent- especially a daily amount that’s high if they stay beyond a certain date.This would at least cover the primary points in a leaseback.I’m curious about when and how the sellers made the request to stay past closing that your son agreed to - was it just between the two parties or was the Realtor part of that conversation?

Enter a maintenance request, assign a vendor, attach a fake invoice.

If you aren’t at risk of losing right away, take a day to think over each counter-offer.If you take a day every time they ask for a concession, they will get frustrated with waiting and will eventually just give in to your requests.