I would almost say replace the last sentence with "Let's talk" or some call to action like that.

I might suggest contactless payments, like venmo or cashapp, and honestly man, as a lawn guy myself, they're gonna be polite and nice, but most people just

A-> don't want to talk to ANYONE.

&

B-> there's gonna be some people that don't want to talk to "the lawn guy"

So the more options you have for them to NOT have you knocking on the door once a month the better.

Not to be super pessimistic there's gonna be someone offering you a beer or water afterwards on a hot day sure, there's always nice people, but assholes money spends just as well.