Sadly, the gentleman I had hoped would be able to complete this project recently informed me that after his cancer surgery he is just too weak to do it. I am in consultation with another woodworker and hope to resolve this in the very near future. Nevertheless, I am happy to report that we were able to raise all funds necessary for its completion. It is, however, a project on hold for the moment.
Update 23/March/22: I have spoken to 2 separate contractors and am now working on getting new bids to complete the work.