Relax Krissy!!! It will be okay, im sure of it.
I had big doubts about our fiance visa as he has NO money, he works part time for 5 pounds an hour, pays his rent with his student loan, and has maxed out his overdraft. He also has another full year of school left. I had about $3,000 in savings.
We got our visa in no time flat!
We had his grandad as our sponsor, with a letter that we may live in his house while we get settled and that he would provide financial support as needed. He is retired and lives on savings and pensions. We got from him bank statements and proof of pensions. His mum also wrote a letter of support and provided bank statements and her part-time employment contract, and i honestly got a bit worried when i looked over her most revent bank statement as she was near her overdraft limit. I started to panic, but it was perfectly fine - got the visa on the 5th business day with NO questions asked!
I think that they are understanding that young people and students arn't going to have a lot of money, but as long as they have accomodation and some people to vouch for them and essentially "take responsibility" (even though you may be self sufficiant, they just want to be sure you will have other recourse, other than needing public funds to survive).
Having an aunt and uncle as financial sponsors should be FINE, as we made it with out little money and our sponsors not having much either.
Honestly, it seems so much harder than what it really is! I think the key is being organized with your application, because I imagine that perhaps the folks at the consulate will fight over getting to process the easy, straight forward, and organized application.