Hi Schnellmann, I think a Maranello would be the perfect car to have to waft around Cambridge in style and then get out for a blast on the B roads when the urge takes you.
Maranello prices haven't moved much in the last couple of years in the UK (maybe firming for the good examples) with a fairly constant amount of stock to look at (maybe 10-20 of each iteration at any one time). For a manual you're really looking at a 550 but the odd manual 575M does come up, usually at a premium over F1's now days. IMHO a manual 575M would be a higher initial investment but probably also give a better return down the line, just depends on your timing in finding one.
Running costs are similar for both Maranello's and for what are plus or minus 10 year old cars, pretty affordable, especially if you can work with one of the specialists. Someone on here should be able to give you a contact on that front. If you buy a car with a main service including belts just completed (which most will come with) you should be able to budget well under a grand a year for many many years. Get a PPI and check the clutch, you should be able to negotiate that into the service if its going off.
You're only real cost is going to be dealer margin getting in and getting out, and that is really down to a combo of your negotiating skills (already experienced there), the individual cars desirability and maybe a bit of market movement in the right direction.
In terms of bang for your buck the Maranello's are IMHO the best Fcar bargain out there.
Good luck and I look forward to hearing your experiences.
Current Fcars: 360 Modena
Gone but not forgotten: 360 Spider, 575M, F430.
Other stuff: '71 Holden GTS Monaro, '80 BMW Alpina B9, '74 Porsche Targa, Caterham, MB CL500, Land Rover Discovery.