I hope you won't let one overzealous fan's opinion completely turn you off of trying 4e. The fact remains that without errata, with no changes, just straight from the book, 4e is a completely functional, playable and enjoyable system.
Kzach is trying to present the system at its most polished, at it's most comprehensive. But given that 5e is at least on the horizon, there is little point in trying to "sell" anyone on 4e at this point. I'd rather you got a chance to at least see some of it in action so you can recognize what worked, and what didn't, what you like and what you don't.
4e has its share of strong detractors, but there a lot of good ideas there too. Good ideas that a lot of people choose to ignore or reject because they don't like how they were presented. So here's hoping you carry through with your plan. There is really no barricade to running a successful campaign within the limits you outlined.