How do I operate the PX dispenser

Hint 1 of 13:

First of all, you need a coin.

Hint 2 of 13:

Look around in the Village for one.

Hint 3 of 13:

Look at the room names.  Who would be likely to have money?

Hint 4 of 13:

The Loan Shark.  Go to his "room".

Hint 5 of 13:

The coin's in the strong box.  See the appropriate question.