as was said,tractors get more per mile at most of the expedite companies.But if you decide the tractor expense will be more,and you will need to run team if you want the big money.It will be big money if your with the right company.
In case you haven't realized,solo's in expedite have a hard time as between the dead head to pick up and load,there isn't time for a 10 hour break in between,that goes for straight trucks too.With a tractor,if you don't do well in expedite at least you can go to another form of business with your truck,not the same with a straight truck.I run team,usually gross more than $ 225000 year,for about 260 days away from home.Don't believe you can do that with a straight truck,except maybe a D reefer unit,and would need to be team there too