While I can't give you any advice on hotels in the area, I can give you a review from the park perspective... I was in DLP 10 days ago. Just for background, I've been to WDW multiple times (it's my home park), Disneyland, and now DLP.
From my perspective, the experience is a bit more like going to Disneyland than Disney World in the sense that I really don't think you need more than 2-3 (4 at the absolute max if you're that person who needs to do everything) to do all the things you want to in the two theme parks. Studios is very small. I would encourage you do the unique shows they have, particularly Cinemagique and Animagique. Otherwise, don't miss Ratatouille. (Go to this ride first, as FP disappear very quickly and the wait gets long just as fast). It's cute and fun and exists nowhere else. Neither for that matter, does Crush's Coaster, but I'd actually consider this skippable. It's an indoor baby coaster with very mild theming. Versions of the rides that exist elsewhere like Tower of Tower and Rock n' Roller Coaster are still fun but aren't really that different from other parks.
DLP is a lot more fun, IMO. Definitely hit up their version of Haunted Mansion (Phantom Manor), Pirates (No Jack Sparrow!), and anything that might be harder to experience depending on where you live (ie Pinocchio and Snow White, if California is a dream). Peter Pan's Flight is always fun, though never worth the ginormous waits it gets. FP if you can. Big Thunder is also great, the railroad is a classic, as is Small World, and Space Mountain is always a must. Do the Alice in Wonderland maze as well. I loved that, even though it was just a walk through. And don't forget the dragon underneath the castle! The castle itself is by far the prettiest of the Disney Parks so take a good look at her, and don't forget to see the castle show.
General nuggets... Make sure you read what the weather is supposed to be like on the day(s) you go. We went May 1, and it was the coldest 50 degrees I've ever experienced. Paris is known for its rain and Marne-le-Vallee is no different. Carry an umbrella or a poncho unless there's a 0% chance of rain that day. Be prepared for swings in weather. I experienced very warm 50 degree days on some other days during my stay in France. It's erratic at best!
The food is...pretty much what you expect. Average. Overpriced. Some of the worst coffee you'll ever drink. Go for the hot chocolate instead.
If you're not too keen on paying for theme park food, you can always go out to the Disney Village and get McDonalds or you can pack some snacks in your bag. Since my fam and I were there only one day, we just sucked up the cost of the food and bought there. We were actually surprised by the amount of food we got at Toad Hall.
If you're only intent is to do DLP, then staying out by it or using it's 6 hotels might be the best option for you. However, if you're going to visit Paris as well (something I'd recommend highly), you might consider staying in or near the city. I can't guarantee the prices will be that much lower (though there are a some places with decent pricing), but DLP is incredibly easy to reach by train. (You just hop on RER A and go til the last stop). Again, I have no idea if your plan is to only do DLP but Paris is an amazing city so consider a stop if you can afford it. (Our trip was a trip to Paris with a day at DLP squeezed in).
Make sure you get park hopper/2 park for one day tickets/ect. The two parks are incredibly close together, and it's really easy to go from one to the other quickly. We went back and forth several times 10 days ago with ease. If you stay on property, you'll get two extra hours in the mornings before the general public is allowed in, which is a nice perk, but not enough to justify the cost of staying in a Disney hotel IMO.
