Sure Sqye, but the OP talked about a big Hollywood venue.
If you play a big venue, you can either
- afford shelling out $250 for a decent mixer because you are playing big venues regularly
- can not afford that, only play small clubs, but this is a special and important gig for you (opening for a bigger act maybe) that should be worth $250 for a decent mixer.
That being said, there are many big touring acts with shitty sound out there as well.