If you are not able to offer a significant amount of money, better don't offer any, ask for volunteer coaches. I think you might find some reasonably strong players who will give you a few lessons for free.
Will you give me a couple of voluntary lessons?
I think you can look for me in Live Chess, and we can play some longer games unrated and I will give you some advice during and after the game.
Hello,
I am a chess coach and in real life I am currently rated 1902, does that meet your request?
I'm willing to help you, however a warning in advance. You are not going to rise from 1300 to 1900 in a few hours. It takes lots and lots off hard work en time.
You may keep your money. We will do it Godfather-style.
If you are interested just start a game with me.