It also depends how long you plan to keep the car. When I restored my Imp in 1989 I spent £1200, which was probably 3 or 4 times the value of the car at that time. But it was never about the money for me, just the pleasure of doing the job and saving the car. The same will apply to the next Imp that I restore.
I doubt that many people make money restoring ordinary classic cars, what ever the make.
I hope you go ahead with your project and join the club, you will get plenty of friendly advise and encouragement on here