In reply to Tigger:
How long's a piece of string? If you mean an impressive high climbing wall, probably not, but there are many excellent bouldering walls about, and they can more easily make use of old factories and warehouses etc, that sounds far more feasible.
I suggest you get on a train (in a covid secure way) to London and visit Vauxwall East, Vauxwall West and Arch climbing wall building one l, to see 3 very different buildings used for bouldering gyms. While you are there make estimates of how many square feet they use and you can do some maths on commercial property costs back in Lincoln, on your train journey back.