Are you making hash daily? Is it for personal or for production? If personal dry sift all the way. If production then go with the bags/machine.
and If you don't have bubble making equipment already I strongly urge you to grab yourself a couple dry sifting screens and call it a day.
Dry sift is cheaper and easier to make. A fraction of the cost for iwe and the end product is superior. One can easily spend upwards of $1000 to make and properly dry bubble hash. (bags, washer, baking pans, drying racks, ice trays, ice makers, ice, microplanes, sieves, freeze dryers, dehydrators, vacuums and the list goes on I could keep going). Dry sift all you need is 2 screens and some parchment and you're good to go. Plus no waiting 2 weeks+ for the shit to dry. There is also no room for error in drying and separation like with water hash which we see all the time on the forums.