A lot of creative ideas, a lot of things will and some won't work...
Cats are a real mixed bag, especially feral cats. They don't necessarily target rodents, many will specialize and kill preferred prey, including but not limited to birds and snakes, lizards, etc., some of which are friends to the fig grower/gardener. You are lucky if the feral cat you have a relationship with is rodent feeder, many are not. Have you considered consequences if they breed and soon overrun the place with cats?
Poison is a slippery slope, it often kills non-target animals, chain kills when a predator or scavenger finds a dead or dying rodent, or they choose to die in a neighbors cistern or water source... I would only use it as a last resort, I prefer traps as they are focused and I get a body count.
Owls are very efficient hunters of rodents, but you might be better off with barn owls rather than horned owls. There are box plans available, check the Cornell Bird lab for plans and information. Keep in mind the owls don't always hunt real close to the box, they may in fact prefer to hunt in neighboring areas. Best success if you and the neighbors set up multiple boxes on adjacent properties. Keep in mind G.H. owls are pretty hard on other raptors, and you may do better with barn owls which are outstanding rodent feeders and not so ornery to other birds unlike G.H. owls. A nest box full of barn owls can be pretty noisy, so consider that when you set up a box.
Good luck, collectively we see rodents are perceived as a serious pest, and keep those strategies to deal with them coming. So far, I am blessed, lots of rodents here but not much damage yet. Bottae Pocket Gophers my biggest issue, and I trap them hard in the late winter prior to breeding season and keep them down to a tolerable level. They are not so fecund as mice, rats and voles. I encourage snakes and bird of prey to help keep them down.
For those of you who trap rodents, here is a tip: attach cotton ball to the trap peddle. Rodents are hard wired to gather nest material, and they will really yank at the cotton ball and set off the trap. Unsalted peanut in the shell, glued to trap with superglue or tied with dental floss also an effective method, forcing them to yank at the peanut and set off the trap. Yes, peanut butter is very attractive bait, but is often licked off without setting off the trap, and "hair trigger" trap sets often go off on windy days etc. Try to shelter the rodent trap from overhead view to reduce non-target bird kills and make the rodents feel secure when they have the last supper...
Vic
Hereford, AZ. Zone 8B
Excel and Hardy Chicago with big plans for the future!