Since you asked our opinion, here's mine.
1. Your husband can't do any of the major service work on a 360. It needs a special computer called OBD II which is sold by Ferrari to official dealers and selected specialists only. In any case, you are not likely to save more than a $1000 a year.
2. You can finance a Ferrari, but on a "longer than 7 year" term? That really doesn't make sense to me. Let's say that you buy a 100k 360 Modena and finance 50k at 8%. I'm not sure about the interest rate being normal but it doesn't sound out of place for a loan like this, especially with mortgages where they are. At 8% for 10 years, you will pay around $625 a month, coming to 7,500 a year. At the end your car will be maybe worth $60k (very difficult to predict) and you will have paid $25k in interest alone! That's 50% of the amount you borrowed.
3. On total ownership cost - this is a bit difficult to predict as it is very dependent on the miles you do, your storage, how you drive, insurance and so on. But a good ball park figure is $2.5/mile (includes fuel, insurance, services, tyres and so on). Let's say you drive your 360 5,000 miles per year. Then your car will cost you $12.5k per year. On top of that, comes the finance of $7.5k per year. Makes for twenty. After 10 years, the car will have cost you $200k and will be worth $60k. All this is excluding, God forbid, accident damage or a major failure of something.
I don't want to sound like a pessimist but don't underestimate what a car like this costs. I've seen and heard to many tragic stories of people that refused to look facts in the face.
Having said all this - I hope you get you realise your dream and that you get to enjoy it as much as I am. Just go into it with eyes wide open, safe in the knowledge that you don't have to worry too much about affording it.
Hope this helps.
Onno