How long are you going for? Could you reduce your nights/days booked to get a shorter Disney fix?
If you can't, you can still go and not have to spend much money. I have never spent more than 200 euros on a full 3-days in the parks. Thats for one adult and one child to pay for, including souvenirs, all food, and one table service meal per evening. I could cut that down further if I had to (and I might have to for our next trip). I could cut out the table service dinners, that would save me about 40 euros. I could persuade my daughter to have a smaller souvenir (after all, its not like we've never been before) - that would save me another 20 euros or so. You could do it even cheaper with a child Ash's age - buy her a Disney toy in the sales here, and take it with you to give to her as her prize when you are at DLRP.
So, I could take 150 euros with me for 3 days, and I'd have enough money. If its the choice between not having table service meals and big toys, and not going at all, I'd choose to scrimp a bit and go. The best bits of DLRP are free - the rides, the shows, the character interaction

.
I hope you manage to get there,