Well to be perfectly honest, you're spot on about it being more maintenance because it's an old car - but I'm a skint student too and I'm runnning one so go for it! It will take a fair degree of attention to keep it running even on a tidy example, but if you're prepared to do that then you won't be facing any more risk than on a newer car IMO. The good thing about old cars is maintenance can be cheap if you go about it the right way.