email the (SGMP) directly. They are very friendly and will answer your emails

They got the race purse up, but not sure what numbers the "Payout based on car count" is based on.

http://www.racesgmp.com/schedule-dragstrip-detail.da?id=297

As for motels, there was a "Family World" at the track exit. But their # is disconnected and they may be closed (again). I've stayed north of the track at a Super 8 or Days Inn.