No. You're at an age where you shouldn't need to be dealing with issues like this. You don't have the maturity or financial stability to give her what she needs. No matter what way you look at it, she is carrying extra baggage at a difficult age. She's probably looking for someone who can support her, but at the same time she's still young and isn't ready to give up her party years just yet. In short; she will have issues most other girls her age won't have. You have to be prepared for that if you want to get serious with her.
Making it clear that you just want no strings thing with her is fine, however it sounds like a pretty jerk-ass thing to do.