Scott,I would look into using cages to allow you to buy smaller BG in greater numbers and raise them to a survivable size vs spending big money on big gills.As they grow and fill the cages you could release some for forage in order to keep the biomass in the cages where it needs to be for healthy fish.Combined with a slot limit for culling LMB I think you would have a good shot at keeping those monsters fat and happy while rebuilding your forage.