my opinion varies.
I keep my truck and trailer as clean as I can. but I'll do estimates in the middle of the day with a load of grass in the back and my shirt and pants have grass stains on them. I mean come on we do dirty work for a living and when your solo your the one doing the work and estimates. if I'm the neighborhood working I'm not gonna make a special trip back there at a later time when I'm more cleaned up.
as for equipment. well I use an enclosed trailer so no one really sees the equipment unless I'm using it. it looks new until I get it dirty. I never wash my equipment. the only water it ever sees is if I'm using it and it starts to rain. how many clients are home when your working anyway?