We stayed onsite for the first time summer 2010 at the GCH. It was about $1300 for 4 nights with an early summer discount. Our last trip (winter 2015) we stayed 4 nights at PPH, off season, stacked discounts, for the same price I paid for the GCH in 2010!!! This summer, we are splurging on two nights at the DLH. It's costing about $1200 for those two nights.
So in 7 years, we have gone from being able to afford the most luxurious onsite hotel for our whole trip to being able to stay only 2 nights in the mid-level resort. Like someone else said, our income certainly hasn't grown in a manner to match the rising cost of the Disneyland hotels! My kids are getting older, and this will honestly probably be the last time we stay onsite. The benefits don't make it worth it. We have officially been priced out!
That being said, I do still think a Disney vacation is reasonably priced (as long as you stay offsite!). We are taking a side trip to San Diego, and the attractions cost just as much and are not as much fun IMO. Unless you just go veg on a beach somewhere, vacations are expensive!