To make a profit you could put up polytunnels and a farm shop with cafe and some kind of family friendly activities according to your location and local alternatives already in situ. It is the tourism and primary school age kids markets that make money, but you need more than a play area to attract parents. Activities, crafts, deli and food shops for your produce and a good quality cafe as hot drinks and meals are the high mark up items.
Would be a nightmare for me not my dream at all but the most likely to succeed because the model is known to public and importantly to council planners.. You'd need to start small but with a clear design and plan in your mind for future expansion.
Me personally, with finance available I would expand poultry/eggs, mirror and expand the orchard and soft fruit, build a craft dksplay shed and workshop, and go for a holiday accommodation scheme of some kind - camping, caravan hookups and rustic cabins for preference. Tourists looking for outdoor activities in the area who would buy my produce and crafts but be out most of the day!