Regardless of truck brand...I would not consider buying anything under a 3500 series for all crew related work. Now for puddle jumping and making appointments, you could even go with one of the mini micro trucks and shoot for milage.
For pulling, all the homeowner series trucks (1500-150, whatever brand you want) A) don't have the brakes or suspension to pull loads day in day out. B) don't have the motor to pull a booger out of a wet bucket of snot, C) are accidents or maintenance issues waiitng to happen. D) don't have the E rated tires necessary to safely accomodate the loads that landscape trucks carry. Spend the money for a 3/4 ton, or better yet a one ton and it will be the best move up you ever made.
I kind of agree with the used truck theory in some company scenarios, i ran stuff that most would have torched up and sold for scap for years. Now having looked back and seeing the difference between all those wekeends I had my head under a hood or body on a creeper fixing that old junk, and simply making enough money to pay payments and have my weekends for family and fun stuff, I would never buy used again. You need to have enough confidence to bet on yourself to be able to justify paying for a new truck vs an old one.
I know I know there are these guys who are constantly asking if thier Yota or Ranger can pull X size trailer....And, this is the difference between those who are really serious about their equipment and those who will be satisifed by just eeeking by. Nothing wrong with either one if it works for you by the way.