Have you thought of using a long lease instead of selling. A 999 year lease is almost as good as a sale and would yield almost as much. I’m pretty sure the diocese would not attach the income stream which the parish earns.
You are a genius! I am going to bring that up at our next Vestry meeting. We are renting other properties, for which we keep the proceeds, so why not? Trinity Church in Manhattan owns and leases half of Downtown, and they are doing very well on that income.