Usual rate at official Ferrari dealers in Holland is EUR100 per hour. Independent specialists you can find for EUR60 per hour.The comment on the maintenance is on the button. I bank on around ZAR1,000 (US$150) per month whilst my fuel cost is approximately ZAR1,300 (US$195) per month. This is in South Africa where I have a good independent mechanic and labour rates seem to be far below those in the US/Europe.
I agree with Onno if that is one of your concern then do not look at an F-carPlease don't take this the wrong way but if you're worried about gas mileage then I think a Ferrari may be the wrong choice. If you can't afford the petrol, you can certainly not afford the maintenance. A Mondial is cheap to buy but it's still a Ferrari and you need to budget at least $3k a year for maintenance. FWIW, you should be looking at around 18mpg.
I would not drive an '80ies Ferrari on a daily basis, although there are people that do (fellow member Schumacher is one, I seem to remember). Ferraris certainly benefit from frequent use, but it's like using any other 25 year old car as a daily driver. Things will need to get fixed on occassion, and this might happen just as you're late for a meeting.