Interesting that 'insurance' is not Liability insurance is not elaborated, only that it's the responsibility of the 'sub'.
The 'sub' would also be responsible for workers comp, IF he has any employees.
Based on the 'ad' Reno posted, $400 a day for 4 or 5 jobs don't sound financially interesting.
License requirements vary state to state. Here in NJ, as it sounds like data/comm a license is required. Dish antennas are considered a 'utility', and dishes under 24" donot require any permits/inspections.
One of our cable companies runs with some form of 'subs'. however I do not know any info.
