I am also running all classes x5 so with 55 toons only 6 toons hold the professions i am capping, the others have JC and mining plus the treasure items for mining and herb and this speeds up mining a lot, but i also don't worry about the mine or garden to much, i focus on the barn and missions, getting Harrison Jones on everyone plus inn level 3 and war mill then just do missions and upgrade followers once a week or so. you want to focus on what will carry over to legion, so capping professions and gold capping is my goal. and i make most if not 95% of my gold from tagging kazz on all toons then holding the felblight until Friday and dump it on the AH plus FL and BoT. Point is there is no way to maintain a ton of Garrison so just focus on whats important to you. If its not fun its not worth doing.