I don't think you're dreaming at all -- I would think that would be totally doable and it sounds wonderful!
We had a much bigger gathering -- it got out of control once my mother realized how much we could do! -- but with the rehearsal for 30, tea for 35 (including characters), wedding and cocktail hour at Epcot, reception at Atlantic Dance (with characters, DJ and roulette/blackjack tables) and dessert buffet in Norway for 70 our total bill was only around $22,000 (I say only because we did so much, not because I think $22K is cheap -- I still can't believe my parents agreed to pay for most of that. But both my sisters had small weddings at home, so this was their one chance for a big "to do"). That didn't include photography, videography or steaming my dress. Otherwise, everything's in there.
The Cali. Grill is amazing -- do you know that they have two private rooms there as well? I'm not sure how many people they hold but they have an amazing view of the property. There's also an amazing room at the Living Seas Pavilion and another above Norway. We used one for our rehearsal and one for our dessert buffet. The Living Seas room has windows into the tanks.
Don't be a afraid to pummel Disney with questions. We did and were pleasantly surprised to learn that since we wanted a morning wedding we could use the Italy Pavilion for FREE instead of paying the extra $1200 for the wedding pavilion (though we did have to pay $150 for two Disney CMs to be "guides" at Epcot). We just needed the ceremony to be over and our formal pictures done before the park opened -- we were having our cocktail party on Italy's isola when World Showcase opened. All the attention made me feel like I was Cinderella!
Wow! I wish I could do it all again. Sorry I'm so long-winded. If you have any other questions just post 'em and I'll do my best to help! I've kept up with a lot of this because my sister-in-law is currently planning a Disney wedding now too!
Happy planning!