car needs a new diff , engine rebuild and new turbo !! and a few cosmetic bits and bobs

is it time to chuck in the towel and look for something else or stick with it ?? the shell is pritty sound nothing major.
so do i stick with it and have all the work done or give up with this one and possably buy another which may give me all the same problems as i have now and just end up even more out of pocket ??
whats your opinons