If you are even remotely thinking about building, then remember thousands of people were not wrong in choosing an RV. If you enjoy working with your hands and are thinking about an RV, then don't delay - leap right in with both feet. Time is of the essence and you will thoroughly enjoy it (and be frustrated and disillusioned etc...) but it is an amazing experience.
Go for it and save the IFR decisions for later.
A
(RV-8 under construction)
PS: or migrate to the US or Australia where the experimental regulations are superb and IFR is possible.