i.e. pay $5 to go back 5 days.
The time travel is permanent and one-way.
Edit: this is a one time offer and your budget is however much liquid cash you have right now. Cards are accepted, though.
For non-Americans, feel free to convert $1 USD to your currency
If I stay mentally the same I would start over from age 8 I think, just old enough to skip the awkward part of having your parents helping you bath or wipe etc but still young enough were all of my life is ahead of me.
With good investments I can never worry about money and I would have all the time in the world to educate myself further and develop a career in a field that I love and not worry about money.
The only issue would be hunting down my best friend and befriending her again.