rlcarey is a always a good source of advice, certainly a better source of advice than a customer who wants you to do something. If the contract has a "choice of laws" provision, it may control.
If not, Kentucky law controls because the property is located in Kentucky.
If the decedent's personal representative is appointed in another state, he can establish an ancillary administration in Kentucky (complete with an order from a Kentucky court) to exercise control over the Kentucky property.
I'm not your lawyer any more than the customer is. Talk to someone who is.
In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.