It's pretty easy. You just need to use the "Show Inn Message" event command. You can edit that in the "System" and "String" sections of the database. But what it'll do is make it so when you talk to the person it'll say "Wanna stay?" and show the price, how much money you have, and show the choices stay or leave. And if you choose stay it'll do the blackout thingy for you. And it'll play watever you picked for the inn sound. Oh and an extra fact: String is mainly editing what it says when you win a battle, lose a battle, what shopkeepers and innkeepers say, and the name of money, HP, EXP, SP, etc. "System" is for editing vehicle graphics, title screen graphics, game over graphics, battle BGM, inn sounds, victory music, that kind stuff.