Welcome to the forum.
As far as I'm aware your financial situation has nothing to do with your visa.
HOWEVER even on a permanent visa you are NOT entitled to benefits here so you must make sure that you have enough money to sustain for a few months (at the very least) when you get out here.
The economy is changing here and it's getting harder to get jobs so factor that into your finances.
I would hate for you to move over and find yourself in a worse position financially!
As usual when in doubt check with an agent (SOMV, Alan Collett, pc, Liana Allan) and let us know how you got on....
"But times change, and so must I. We all change, when you think about we are all different people, all through our lives and that is okay, that is good you gotta keep moving so long as you remember all the people you used to be. I will not forget one line of this, not one day I swear. I will always remember when the Doctor was me."
-The Eleventh Doctor (Matt Smith)