Stable conversion

I was wondering if anyone has done any conversion on stables to living quarters at all or have information that may be handy for such a job?
I am looking at converting some existing stables to accommodation for people who want to visit my farm and learn from it. Jobs I see directly are putting down a proper floor, sealing the gaps in the doors and walls, and extending the enclosure completely to the roof. Indirectly I am looking at jobs such as how to heat the place, supply water, cooking facilities etc.
Would be interested in any ideas people may have for such a task!