One More Circumstantial Consideration

To come to California to care for Blanche and Rupert, Frank and Caro had to abandon their life in Canada. Before they left, Frank shut down his business (the financial cost was considerable) and Caro closed up their house.

Rupert intended the offer of the inheritance to motivate Frank and Caro to make the considerable sacrifice necessary to come to California.

Question - Which way of understanding the offer is consistent with its providing an adequate motive to come to California?

"Come to California. Just promise me you will come, and you can count on Caro's inheriting everything."

"Come to California. If you get here, and I have not changed my mind in the meantime, Caro will inherit everything. But beware, you come at your own risk."