I think there's two ways to look at this situation. One: the blow thru carb does work, it just takes some finessing to get it right. It won't be as good as EFI but it will work. It's cheaper so you can get your car together and driving sooner and possibly be saving the money to get EFI going later down the road.
Two: you're wasting money on the carb that could go towards EFI.
Personally, I look at my car like a journey, not a destination. Sometimes I have to backtrack, but that's just part of the fun.