Jonathan knows he only has to ask and he would get all the advice and assistance he needs.
My primary concern would be to get the Council to agree to it without a fully enclosed field - as in roof.
We was going to run one at a NEC show a few years ago and the health and safety guys down there had a field day with what they wanted us to do.
The Archery exhibition had to just turn up we would have needed three days set up to get all the nets in place.