Try visiting the disneyworld.com website and putting in dates and the number of guests with their ages. Then check the prices you get for the different resorts.
Again, the best way to get an idea of what it will cost you would be to go to the disneyworld.com website and pricing out a vacation yourself. We have no way of knowing your exact dates. "Summertime" is not a date and rates vary during the summer months. We also don't know what kind of tickets you might want (hopping? non-expiring? waterpark fun & more?) or if you would want a dining plan.