If I were you the first thing I'd is check whether she'd opening it privately or not (most around here are nowadays - I can't think of one committee run locally) as that would cut down your research workload.
If private you just need to rent her the room/space and she does the rest! And yes to ofsted check of premises, but that usually done when it ready to set up.
Just for your ref- we're in a scout hut and pay around ยฃ12 an hour, heating/electric included (plus a phone line in, but we only dial out in an emergency) Currently no internet- but the scouts actually want it for themselves so they're trying to sort something out.
We supply toilet rolls and hand towels ourselves - although we do a bit of give and take on that one!