I'll do it for £125 if you want!
Seriously though, how far would you need to drive it before you would get the chance to change them yourself?
If it's less than 50ish miles then for that same £130 you could buy yourself a trolley jack (with a decent rubber lifting pad), a set of wheel chocks, one of those extendable wheel wrenches and a torque wrench and I guarantee that after a good clean, you wouldn't be able to tell the difference between a new wheel and tyre and yours apart from a slightly rougher looking tread - they'll still have been driven a certain distance (probably less than 10 miles) when you pick it up. It'll probably still have the bobbles on the tyres too.
If you've already got the stuff listed above to do it, it's a no brainer - I am assuming here you are fit and well enough to do it yourself obviously!