Doing 80%'s isn't usually about saving money. Some types can be less expensive and it gives you the option to use less expensive 3rd party components, but by any large, they'll run about the same as an off the shelf, and typically even a bit more.I have thought of building one for quite a while but it never seems to work out on paper for me. It seems to cost more to build an 80% 1911 than it does to just buy one???
Now that we can't even buy one in Oregon it makes more sense to build one.