I like this idea, and I'd like to play Master's pet with you if you're still up for it. I'm in a submissive mood at the moment so I'd like to play the young man who is purchased.
I'm particularly intrigued by your idea of a farmhouse, particularly if we were to make it similar to an english country manor. Big expensive house surrounded by farming land. Stables and livestock to tend to.
I love pet play and being treated as an animal and I like the idea of throwing some real animals in there too. If you're interested we can brainstorm and come up with some other ideas, feel free to take a look at the ons and offs thread I've written. The link should be in my signature below.