The tiny sums mentioned in the article were a surprise. If it can be that cheap to make significant progress on such an intractable problem, imagine what some serious dough could do! Christopher and Dana Reeve foundation have some resources.
That might not be the total cost. I tried to find what that was, and who funded it, but can't. I got as far as the sources of support for the research department: https://www.ucl.ac.uk/ion/depa... -- but the actual operation was done in Poland, and I think going further might require reading Polish.