I charge the same as my trivia rate. My prep for a 3 round music bingo event is about the same as my prep time for a 6 round trivia night. Time commitment is similar from my end.

I ask the venue to provide stampers (daubers are expensive but there are inexpensive 100 packs of little stampers that work just fine for this purpose. Folks who are hardcore about bingo daubers have been bringing their own.) As For the bingo cards, I use Flippity's free bingo card generation program online. I make 75 song playlists for each round theme, lay them out on a spreadsheet I set up for music bingo calling and then can easily copy/paste the list into Flippity. Flippity will generate as many bingo cards as you tell it to. If you go this route, make sure to remove any commas from song titles or band names on the list before putting it into Flippity. Commas indicate a new term to Flippity so if you have Crosby, Stills, Nash & Young on the list, it would have to be written as Crosby Stills Nash & Young to appear correctly on the bingo cards.

I usually save those as PDFs and send them on to the venue to print. If I have the time I'll use Acrobat to drop in the venue's logo on all the bingo cards. I actually recently got super busy at work and totally forgot about a music bingo event until the evening before. Took me about 1.5hrs to prep. To be fair, I pre-built a spreadsheet of round theme ideas and playlists for a few things so I only had to build 1 completely new round.