C.S.
There are all kinds of places to eat in Vegas for under $50. You don't mention where you will be staying and if you have transportation.
Grand Lux - Palazzo
Grand Lux - Venetian
Hash House a gogo - Caesars
House of Blues - Mandalay Bay
Firefly - off the strip Recently firefly was closed for several people getting sick. They relocated and it is my understanding their quality and service is now excellent. My daughter recently went there to eat, however, I cannot bring myself to eat there. I have eaten there many times in the past and love their tapas. They serve $5 - $6 plates, you order everything separate.
There are all sorts of choices, just look up the hotel you are staying at on line or go on Trip Advisor.