or you could get really creative and do something like this (bear with me here lol) you could sell both the 55-250 and t2i for 350-400? just guessing here. and buy this
which uses up your 750 buck budget and leves you with 2 standard zoom's and no telephoto (along with a huge paperweight I will get to later). Sell the 18-135 for $300, buy the 55-250 stm (you might even be able to get the 55-250 stm bundled in with the 70d like other packages, but it is not listed here, but would be worth it to call and see), which would give you a much better autofocus system which will help alot with the sports shooting along with a much faster frame rate, and a better lens to shoot with, upgrading both your camera and lens for your original stated budget (with a little work, selling stuff). Now back to that paperweight I was talking about, if you waited until after the rebate ended to sell it you could probibly get 150-100 bucks on your local craigslist for it, bringing your budget up to the 70-200 non is range vs the 55-250 stm (granted there is some debate on a few review sites i have gone to as to if the 70-200 is actually that much better, but that is up to you). Or you could just keep the printer and print off the 20 free pages you get from it and then use it as a stool or something like that lol (or you could just keep using it if you want).
Now I know that seem's like a lot of work but in the end it could get you a new camera and new lens and possibally a printer if you kept it all for your stated budget.