Sorry I missed this!
On The Strip, the Caesar's Palace buffet is good, though pricey. (I have heard great things for the Sterling Brunch as well, but it is $100 per person).
Off The Strip, generally any Station Casino buffet is good, Green Valley Ranch being the best of the bunch.
Budget restaurant near The Strip, barring Burger King cause it's so cheap lol, Boston Pizza is pretty good and not horribly expensive. A lot of stuff is super pricey on The Strip, though. Even fast food.