That's a great idea, I've been considering for years
the built in side fills that is. I doubt 50 watts is going to be much use for any but the smallest gigs though (as indeed 126dB is barely enough for FOH, assuming the calculated figure is just for the FOH speakers and not for the whole lot......). Sadly they're too expensive for my duo gigs so I'll just have to stick with what I have... and definitely not big enough for anything where wifi would be more than a minor convenience (you still need power after all).