With Sierra Academy you have three visa options... M1, J1 and F1.
After completing your ASEL AMEL COMM INST, you can continue in to their CFI CFII program.
Beware that getting all your ratings with Sierra does not guarantee you a job with them as an instructor.
You need to do your fair share of being a "nice boy" and keep your " nose clean "
as hiring is on the discretion of Chief flightinstructor and bsed on the recommendations of other instructors.
Although some have been hired With CFI only the usual prerequisite is CFII.
Most of the instructors get Their MEI after they have been hired, as they get staff discounts.
You are not hired as an MEI only you'll fly all the types in their fleet C152, C172 and the BE76 Duchess.
Sierra will assign you students and as they progress and move to the multi you will teach them in it.
You can build around 6-8h a day depending how many students you have.
Instructor makes an average of 1200 - 1600 USD a month ( minus taxes ) again depending how much you fly.
Sierra Academy also has 2 separate programs the Korean Air program based in Livermore airport and CAFC ( Civil Aviation Flying College Of China ) program from PRC.
Instructors in those programs are on salary.
If flight instructing is your way of building hours ,Sierra Academy is a very good place to build those as they have plenty of students start on every months first monday.
Anyways any questions ... I'll do my best to answer.
JJ