i've been where you are, i actually bought my t-type when i was 17, i was also on a budget, i saved up enough to buy the cheapest one i could find. big mistake.
take your time, start saving money now and buy a nice lower mile t-type when you have the money. you'll be glad you did. you don't realize it now but trust me in 6 months your'll look back and say "i was the worst driver ever!" i said it, all my friends said it. i had been around all kinds of racing too, but it didnt' help much. a turbo regal is not the best car to have when your still new to driving.
and when you have a nice one you'll be VERY happy you waited. and you actually will save money when you concider all the misc. stuff you'll have to fix in a high mile car, or the nickle and dime stuff you'll have to buy if you swap in a new engine.