Here an option for you…
@HE_MAN has a really slick cart set up, maybe he can post the video for you.
Like @cactus27 said if there is a will there is a way @jkeeper!
There are many successful guy and company’s that run store front route work by bike or foot, I know a couple that have used public transportation also when needed.
You can also use the squirt bottle method, less water consumption less weight to carry around @jkeeper heres a link to Jordie’s @TheWindowCleanse you tube channel this is the way i also do most route work!
Good luck out there!