Tenants get together and agree to hire out window washing and lawn care to someone's able bodied grandson or nephew. Or just some unemployed person who is willing to take on the job.

Some kid could get in there and wash all the windows and do all of the lawncare without various people having to set up and do each task individually. Most of the effort here would actually be in the setting up of equipment. One person -- or a two or three man crew -- could just set up, do it all, get paid and get it over with for everybody.