The motel I would recommend is the Park Vue Inn which is directly across from the Disneyland entrance. In fact, the crosswalk is right in front of the motel. You just walk straight across to the park!
I liked the convenience of this place for afternoon naps since you don't have to wait for a shuttle and the entrance is easy to get to, especially if you are pushing strollers. It's not fancy, but clean. And it's definitely going to be less than staying in the Disneyland Hotel. Use the extra money you save for food at the park!
Also, this motel has rooms with a mini fridge and a microwave. A plus for keeping water bottles or juice packs cool. They have a very decent breakfast with waffles, hot oatmeal, toast, cereals, fresh fruit, juices, coffee, etc. That's one less meal you'll have to think about!
My tip is to get a room with 2 queen beds because the room is bigger than the ones with bunks. I do not know if they have suites, but I bet your little ones will be so tired out and fast asleep after a day at Disneyland that they won't wake up to anything.
There are also many restaurants right along the block if you don't want to eat in Disneyland. (I-HOP is right next door).
We are definitely planning on staying at the Park Vue the next time we go to Disneyland! Have a great time!!!