I'm curious, how many different types of electrical licenses are there in your state.

Here in Oregon there are 13 not including Electrical Inspector or EC

PS- Electrician, Limited Supervisor, Manufacturing Plant
LR- Electrician, Limited Residential
LRT- Electrician, Limited Renewable Energy Technician
LMM- Electrician, Limited Maintenance Manufactured Structures
LME- Electrician, Limited Maintenance
ST- Electrician, Limited Journeyman, Stage
SIG- Electrician, Limited Journeyman, Sign
PJ- Electrician, Limited Journeyman, Manufacturing Plant
LEB- Electrician, Limited Energy Technician, Class B
LEA- Electrician, Limited Energy Technician, Class A
BME-Electrician, Limited Building Maintenance
S- Electrician, General Supervising
J- Electrician, General Journeyman

Of course as an EC you can't install.
If you hold an S and an EC you have everything covered for a one man shop.