Help me achieve my dream car

As a close to my degree IT student in a University I am pretty close to get my first job after degree and start to earn my own dreams and hopes, I always loved mechanics and engineering fixing things checking how do they work.. so an own car would be my own desk to learn every bit of a car, as an IT student i would like to work in somehow related to car manufacturing like GPS programming or microcode programming. As a kid i always loved LEGO, more precisely Technic built so many great and simple machines from automatic transmission to pneumatic engines, i occasionally buy even until today.

My dream car is a BMW E31 the ultimate driving machine of the 90's (produced from 90-99), the exact model that I am looking for is now selling for 18500 euro, it is a 4.4 liter naturally aspirated V8, low mileage, manufactured in 1998 one of the latest models where many early problems were solved in a beatifull Laguna green metallic. It is a time less car just stuck in time, because not so many sold, had no time to shine as much as it deserved, released in an unlucky fuel regulation period, it is the least sold series of BMW.

As i have calculated i can get the money in 4 years if i save as many as i can but the problem is these cars price is going up like 1-2 thousand euro each year, if i get the money in 4 years these cars will be more expensive and even more rare, the time is working against me.

Help me achieve my dream car, if i can get it i will start a youtube channel with a series of buying procedure through mechanical and electrical challenges (even programming) till the final touches to make it a perfection. I don't want to make a garage queen car, it would be useless, i want to drive it, feel it and enjoy it as long and as much as possible.