I have 10 farms at level 18 each, 40-50K diamonds, all four APCs with T1 troops. Only require one power plant. Currently can do gathering day and get 3 boxes. ZC at 5%. 3000 courage medals, 1000 wisdom medals. Since I use a bot the power plant refill is no problem. If you have no bot then you cannot use as a passive farm. $200 for the lot, including email address. Currently in state 813, which is dying, so you need to migrate all of them to your own state.