we many come to that one day and i will ask on here too, my brother in law was lucky to know a land owner in Leicestershire who had lots of rented properties on his land, another friend rents one with stables and now has chickens!!
I would try to find a land agent too, other than putting houses to let, like on Gumtree, there are a few other sites too but I must check as i have currently given up looking
They could post an add in a farming area place like the cattle market in Stirling or put an add on Gmtree yourself, I have an add on there and have had interest, also there was a house for sale localy that they would let so try that too!!
Good luck and do let us know, its hard, funny thing is when we moved up here we h ad to rent and had a choice of 2, one had just been let to some one else so we ended up with a farm cottage and although damp was wonderful, the farmer was so friendly with us too, they are knocked down now and posh houses built in thier place, never remember how I found that but it was with an agent and not on right move or any of those sites!!