UK: Urgently seeking accommodation

Eco-friendly, home educating family seeks long-let 2-3 bedroom accommodation for under £75p/w with no hefty deposits required. Widowed mother with 3 children, 1 well behaved dog, a few cats & a small but steady income is looking for modest, private lodgings (Static caravan or similar). Would be more than happy to undertake duties such as Caretaker, small-holding or gardening jobs, campsite maintenance, pet-sitting or housekeeping, etc in return for a place to keep bees & grow veg. Can provide excellent personal references.