3.0 SSRX TD head gasket: cost to fix???

[Tornado]

Hi,

My L Reg 3.0 TD SSRX seems to have blown a head gasket:
- recent possible overheating (cracked & empty rad)
- bubbling radiator when cap is off
- white clouds of exhaust on some starts

So I probably need a new head gasket - or even a new head - plus at some point soon a new radiator. (The epoxy repair won't last forever!)

(I also need 4 x new tyres)

Sooooo .... what should I budget for the new head gasket plus labour?

And the new rad whilst there?

I suppose that it might in fact be time to scrap the car ....

Any advice?

PS Any chance that a mechanical newbie could successfully change the head and/or gasket and radiator himself? Or is it a task from Hell?