Looking to make trucking a side buisness need some advice

Hello all im new here thought this would be the place for good advice. I currentley am employed and have no intentions in quitting. I have had a single axle international dump for a few years now and i have made some decent side money. I do all my own repairs and maintenance. trucks are kinda like my hobby to so there not only my tools but my toys to so i get alot of enjoyment out of working around trucks. I have drivin a friends 379 dump for a while as well when he gets busy. I think i would like to sell my single axle and buy a full size dump. used of course something in decent shape. $30,000 or less. like i said this isnt my daily workhorse so i dont need what you guys have.ideally one day i would like to have 2-3 dumps and a small buisness but we will see with this economy! Or would i make more as a o/o and not paying two other knuckle heads to tear my trucks up. These are my questions:

1. stick with the litte truck or go big? Keep in mind i do all my own repairs

2. Dump truck vs Road tractor with a dump bed?

3. Stick with one truck or if i get enough work go to two? Where will i pocket more?

Thanks alot guys i apperciate any advice.

 

Was looking into a tandem axle. prob a steel dump. Now im just hauling dirt,firewood,corn,mulch. I mean if i got tandem i would prob try to get some dirt or asphalt work. Im in the baltimore area theres alot of work just all in who you know.