I love freecycle! Our trouble is transport, though some people have been great, dropping stuff in or meeting me somewhere on a bus route.
Print out your garden photos several times, and draw on them or make cutouts of things you might want and place them on as a visual plan. Your grandchildren may enjoy helping! We use this at work, with autistic kids who, like you and me, struggle to visualise,and have poor spacial awareness.
Would anyone in your community/smallholders asc/young farmers etc maybe help? Sometimes its good to play on one's weaknesses and be honest, there are some helpful folk out there...