minimal time.. and yes.. i cast my own weights in various sizes and applications.. rear, hanger, wafer, dead
ballast..e tc. wheel weights are no different.. and you can pour in place using the tire rim and visquine, some carriage botls and nuts and small rebar or heavy brace fence wire..
lay rim down. lay plastic down put carriage botls in/thur plasic and nut in place with heads sticking up into cement area.. use whatever you need to shape the plastif to make a form you want.. then pour.
I've seen guys make weights with 5g buckets that stick our the side of their tractor wheels.
it's not hard.. and is so cheap it's funny...