Where to park for the heat game tonight?

Hey everyone, im here on vacation and wanted to go to my first NBA game. I was just looking parking around the Arena and it all looked very very expensive. I read some threads about parking in the Museum, does that still work? I have a rental car and am currently in Key Biscane. Planned on leaving here soon and grab something to eat and look around for a bit before the game. Any tips appreciated since i really can‘t find anything online :( Thanks in advance!