If ya feel like yer gettin the run-around -- don't take it personal.
This job has so many variables that no one can really answer your question directly -- every install is different.
Also you haven't been clear about whether you are getting in bed with a company office (who supplies a bulk of your materials...but less pay), or just working for a dealer (who doesn't feel he needs to supply you with anything beyond system equipment and dish, but usually pays a little better), or lastly a contractor disguising himself as a dealer and working several dealers' installs (which, by the way, are rapidly diminishing -- but that's another story). That's just the front end. Then you have truck fuel, maintenance, licensing, and insurance. If you actually complete 3-5 installs a day (which would be minimum to break even), you will need anywhere from $300 to $800 in supplies...some weeks less, some weeks more...there's no predicting until you have enough time in job to "see" it when you read the work orders...and even then there are exceptions.
And did they mention spiders, snakes, skunks, badgers, dogs, cats, customers (AND THEIR KIDS) in the crawls and 100+ degree attics with no clearance and a junk closet to clean out before you squeeze thru that foot-square hole to get there?
Granted, DishNet as some of the easiest systems to install -- IF -- all the wiring is recent...but they are the worst sticklers about being "up to their standards" (ergo: chargebacks) outside of Mastec (the DirecTv idiots). And don't forget you are also required to install FREE phone lines if needed.
Then we might touch on pole mounts and buried drops...brick mounts...apartments...mobile homes...chimney mounts...
NOW maybe you get the general idea...not to be rude, just heads up! L-8-R-B.