I think that the first thing to do would be to make a budget. This will give you an idea as the whether another trip in such a short timer period is even possible. It doesn't have to be a detailed budget but it should include the big 4: transportation, accomodations, food and tickets.
If you'll be flying, you can research fares without booking them. Try
SideStep.com for airfare from your area to MCO. If you're not staying onsite, you'll also need to budget for ground transportation (either a rental car or airport shuttle service). If you'll be driving to Orlando, you can estimate gas costs at
AAA's
Fuel Cost Estimator. Don't forget to add in any road tolls.
For hotels, you can get a good idea of what your costs will be right now. Disney's rates for 2006 have been available since last summer. Most Orlando hotels have their 2006 rates published, too.
Tickets can be purchased at a discount from online brokers like
Ticketmania,
DiscountOrlandoVacation or
TheOfficialTicketCenter. Check their prices for the tickets that you'll need and total up the costs.
For food, you can spend as little or as much as you want. You can always have breakfast in your room instead of eating at a restaurant. You can have lunchmeats, peanut butter, jelly and bread for sandwiches when you get back in the evening. Our family of 4 budgets $125/day for food but I've got 2 teenagers and we do one sitdown meal each day. You could get by on much less. DisneySteve manages to feed his family of 3 on less than ½ of what I spend.
After you've added up your estimated costs, divide the total by the number of months that you have to save the money. Does that number look doable? You might be shocked to see how much you would need to save each month in order to get back to WDW so soon. Of course, you can adjust the budget by reducing the number of days that you stay, dropping magic plus, hopping or no-expiration from your tickets or skipping the character meals.
To save for the trip, you'll have to spend less or make more. If you're already living hand-to-mouth, spending less may not be possible. If you have a comfortable lifestyle, you should be able to squeeze a little from the budget by being frugal with your spending choices. Given that you're going to school and raising a child, I don't know if a part-time job is even worth mentioning. You might have more success by eBaying some of your DD's outgrown toys and clothes. You might find that it is all that you need to do in order to make your Disney money.
I was once a poor college student as well and WDW was never within my budget. I can't imagine trying to go to school and raise a family at the same time. I admire you for being able to accomplish both. I'm sure that someone who can do those things can also make room in her budget for a WDW trip...it just might have to be a little later than you would like it to be.