Quote from @Moises Salazar: Seller financing is a negotiation and can be anything the two parties agree to.

Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.

Seems like a great way for rehaber to make the financials look any way they want.I can think of a few technologies that might help track income and expenses across projects that don't involve saving pieces of paper / invoices / pdfs :)  

By negotiating effectively, we reached a deal that suited both parties, allowing us to focus on planned renovations that would significantly increase the property’s resale value.

Divorces are not usually amicable so trying to get another party to agree to make money on the house (and move you out) will be time consuming and very unlikely.This statement though, "it is just sitting due to interest rates", is troubling.

If looking to scale flips and create systems around it to minimize your time and involvement, I'd highly recommend putting a team in place that can handle the day to day operations. 

Unfortunately, these are considered “investor hours” and will not count unless Jackson was involved in the day-to-day management.

After all if you get the deal done, you are creating more opportunity for everyone involved!

The only time I charge a tenant for a service call is if the tenant schedules a service call with one of my 3rd party vendors (that schedules directly with the tenant at my request) and then either no-shows or doesn't allow the vendor to enter as agreed.

Your parents and you could probably use a really good Elder law atty in NY as well to look at how best to structure their ownership and passing to you.Nothing wrong with selling to a related party and completing a 1031 exchange.