"Kartoffel?" Isn't that the german word for "potato?" Anyway, not the point here.
Yeah it comes down to money in large part. But also important is how willing you are to do some or all of the work yourself. Maybe you have never painted a car before or done your own upholstry but there is always a first time right?
With regard to cars I swoon over 32-34 ford roadsters, fenderless of course. I understand these cars need some special attention due to wood used in the body framing.
Tri-five chevies (55-57) are neat but common, at least where I live.
Mid to late 40's woodies are a real treat and getting to be very prized.