Meh, sounds like pretty fair pricing.
Don't forget, its not how fast you go its how quick you get to the speed limit

I achieved similar gains with a ECU reflash in my Subie and haven't found that I speed any more than before. I just enjoy the nice kick when accelerating up an on-ramp or passing people.
Accel in my 2.0T is already great..quattro hugs the road VERY well. But it's by far, the best, bang for the buck upgrade. I'll need to swap out DV though, they always put in crappy ones anyway. As far as that though, I 'should' be good after I do it.
Once my warranty is up in 1.5 years, i'll probably end up doing it.
This is actually my concern as well. I do have the space to work at my house in SC, but I haven't been living there for nearly 2 years...and I'm not really planning on moving back to it in the near future. Will likely be parking in the street or in very restricted areas that will not allow me the opportunity to work on the car. We'll see...4 years is a long time from now so I don't know where I'll be living then.
I also might move out in 1-2 years, so who knows. I've done plug changes/filter changes on the street, beyond that, I don't want to do anything else, haha.
I can do rotors/pads at my BiL/sisters house if they aren't busy. Just did the Grand Cherokee....4 rotors/pads, 8 plugs, filters, oil change, etc 2 weekends ago. Hard to schedule a good time though, for work like that.