Deer/6’ fence the perimeter, plus another internal fence 20-50m inside and plant trees for future crops -fruit nut, willow, firewood, etc., look out for any grants to help with the fence cost and tree planting. Then lease the “secure dog park” for £10/hour. Set up an online booking form and a coded padlock on the access gate beside the designated car parking spaces. Tap for water, perhaps some agility equipment in a separate paddock. There’s a place near here my friend tells me is booked till mid April. This feels as close to money for nothing as poss. Could generate £50-100 day. Uses up maybe 1/3 of your land but generates income to allow you to do other stuff. Your fields will be secure and eventually sheltered by tree belt which will benefit livestock and any growing enterprise you want to do. Also creates people traffic to sell surplus produce to; eggs, salad, herbs, veg, art, crafts, etc. A group I work with sold Christmas willow and holly wreaths for £20+ each and bird boxes are always popular, as can be kindling bags, carved things, etc.
Cons, people are hassle. Might not be the peaceful isolation you are looking for. Insurance. Dog poo. Stress for livestock.
I like hens and breed every year but there’s little money in it. They go for £20-£25 which is same as 10+ years ago. That said I wouldn’t be without them. There’s a chance we are witnessing a bottleneck in rare breed genetics due to avian flu restrictions and grain inflation. Therefore I feel if you can keep a rare breed going it may prove very useful to future keepers.
I had a few goats and they were great but a pain in the proverbial. More hassle than sheep or horses which surprised me and def isn’t everyone’s experience.
This is a huge, lecture post, first time I’ve had to let my mind wander all day!