Usually takes me a week to ten days, the house is about ten minute drive from where I live, and in tge circumstances the "ÂŁ500" is just a token gesture......I have rewired house recently for a mate for a few bottles of tuborg, I like electrical work and it's not about the money with me!
I am sure money doesn't matter to you at this point and you only need some hands on experience.
In Essex, they charge a minimun of ÂŁ2500 for a 3 bedroom rewire including standard matrials and 7 or 8 days labour.