The money for the redevelopment has come from the council. Approx £750,000 was the quoted amount. Whether this is how much is actually spent I don't know.
The ground is now run by a new entity - Holm Park Community Football Academy Limited - the board of which is split between Clydebank, Yoker and the Council.
I think it is safe to say Clydebank no longer groundshare with Yoker and are now equal partners.
The development only includes a new pitch, floodlights and perimeter fencing to secure the ground.
Any further development will have to be funded by the club(s) so I wouldn't expect anything else to happen anytime soon, though I'm sure Clydebank's board will definitely be looking at other funding possibilities.