A premium pass is currently $329 for ages 3 and up. so if you lve to 80 and buy one every year, that would be $25,662 for 78 years worth, but you have to assume a fair hike in the price every few years, but you should also get a decent for buying in bulk, so to speak.
$20,000 seems fair to me. They should pro-rate it based on your current age.
How about an annual all US park pass for $750? This would actually come in pretty handy. I was kind of bummed the first time I went to WDW as a DLR AP and it didn't mean squat...
have you guys ever heard of the Gold Passes? They are the closest thing Disneyland has to a lifetime pass (except those granted by the company for special guests, i.e. the 1st Disneyland & DCA guests, etc). Basically, they are granted by the CEO only and allow you to get up to 10 guests in for free every day, as long as your pass is valid. Oh, and they work at WDW too!
-"We can see a new horizon...built on all that we have done..and our dreams begin another thousand circles 'round the sun!"
-- Epcot: Illuminations "Reflections of Earth"
-"...Each dream that you chase, each wish you embrace can lead to a fabulous faraway place...!"
--DCA: World Of Color