Right... think i need advice!

Im 18 goin on 19 and would you believe... want an rst series 1!
Ive looked into all the methods,

- Insure it in your dads name and you as a named driver.
Ive tried that and the cheapest i can get is like 2500 which is shit and too much. Liverpool vic wont even insure me htrew this method. Then theres the other method...

- Buy a shitter and insure fully comp with a company like hastings direct. Theyll insure on anything else third party and so on...
Do you know of any other companies which do this, for say cheaper, because for example liverpool victoria wont let you drive anything else third party with u being under 25 and everything?

And after all that, is there any other methods or just good companies to use, whats your insurance and policys and stuff? thanx