Much depends on what you want from the holiday. Disneyland is about 10 m from the centre of Paris as the crow flies. There is a regular train service:
http://parisbytrain.com/rer-train-paris-to-eur o-disney/
The resort hotels at Disneyland are OK but on the expensive side especially when it comes to food and drink - alcolhic drinks are deliberately overpriced to discourage drunken behaviour, hence the petrol station on the main road doing a roaring trade....
You can get every variety of hotel / price in Paris but you need to decide how much of your trip you want to spend travelling rather than looking round either Paris or Disneyland.
In addition at certain times of year Disneyland can get very crowded, making it practically impossible to see and enjoy the parades etc.
As a compromise, why not plan to go to Disneyland, say by Eurostar, stay for one night there, then spend the rest in Paris?