I did a touring setup recently for the first time, here is what my research found:
1. Buy Daymakers and skins, use your all your existing alpine equipment. Lowest cost approach, best for occasional sidecountry use. Heavy and have to carry daymakers.
2. Buy Frame bindings and skins, use all your existing alpine equipment. Next lowest lowest cost (depends on binding price and remount vs daymaker price) Less heavy than daymakers, don't have to carry daymakers, frame bindings don't tour as well as daymakers with alpine boots. Always have extra weight of frame bindings on skis, rather than removeable weight of daymakers.
3. Buy hybrid bindings, touring boots w/pins, skins, use light alpine skis. Now you will have much better touring performance, especially depending on skis. Weight can vary a lot depending on gear choices. Hybrid bindings would be shifts, cast system, Duke PT's. Downhill performace will vary a lot based on gear choices.
4. Buy tech bindings, touring boots w/pins, skins, and touring skis. Lightest, best touring setup. Usually will give up some downhill performance for much better touring (at least less effort uphill). Can vary performance some based on gear choices.