I helped my friend out once a week (2 men one van) trad work, we covered some ground. Anyway it came time for him to sell work as he was moving away, i bought a section of it.
Reason for the waffle........on my own it took me a day to do only a small section of what we did together in about half a day.
So 2 men in one van sounds the best set up in my head.
Ive had people help me on wfp, one did all upstairs whilst the 2nd followed doing downstairs, slightly behind. We flied through the work and because one was infront it stopped the talk time on each house. So ur earning well without the running costs of a 2nd van and all that comes with it!!
Lol, not that it matters but they would be my take on it depending how big your growing at the moment