Congratulations!!!
I am an avid Disney property girl. However, the Wyndham at Walt Disney World (Lake Buena Vista) is right across from Downtown Disney, has shuttles to the parks, and they run awesome specials as low as $59 per room, per night. They also have character breakfasts and other things. I am staying there on the 28-30th of this month so I will let you know the cleanliness as I see it...and I am a stickler. But I am getting it for $59 per night myself.
It is clean and safe and I bet if you called them directly, or emailed, and told them that you want to pay in advance and etc, they might give you a better deal. Even better, go on Hotwire and Priceline and check out their rates there, and then call Wyndham (or any other hotel for that matter) and see if they will match it, because hotels have to pay a certain percentage above the deal to those sites, so you will be saving the hotel money in the long run...and yes, I work for hotels so I know the tricks you can use better than the average person...
Good luck!