There are a lot of hotels one and two train stops away from DLP. The station at DLP is right beside the entrance.
Have you priced the disney hotels they have different budget ones and depending when you go you can get good deals.
You could stay in Paris if you want to do a bit of sightseeing and maybe spend one day and evening in DLP. I you get a one day/park pass you can use it in the other park in the evening so choose one of the days they open later.