WHAT! You can't be serious? But then, I know you wouldn't tell a word of a lie.....
Take the wheels off and leave them into a fitter. It will be half that price. Don't pay £315 for a pair of new tyres.
I've just had a new pair fitted: £179. Tyre prices are going up just at the moment. Oil prices and all that...
The hardest part about the bearings will be getting them out. Easy enough to knock in new ones with your famous giant boots. So if you're not sure you might be best letting the shop do them. But again - just give 'em the wheel, not the whole bike. And check where they're getting the bearings from. You don't want to be paying Guzzi prices. A few quid will buy two bearings and then its just the extraction/fitting labour cost. Do both bearings, not just one.
Get an accurate measurement of the spacer before the bearings go back. You might want to insert a 1mm shim, or at least be able to contribute to any future threads concerning the variable length of Guzzi axle spacers.
Don't forget to admire the rusty water that will have gathered in the needle roller bearing at the bevel box end.
You'll need to corespond with JRT about your personal problems
Disgraceful. The sooner you Great Britain part of UK Johnnies have to do MOTs at proper Government Test Centres, packed to the gills with computerised machinery, the better.