I’ll try to speak a bit about School Psych. I am in the final stages on my EdS in school psych.
School psychology involves primarily assessing students for disability areas determined by the state. You can work as a school psych with just an EdS (in between masters and PhD). With just an EdS you generally just work in school systems. Most school districts have 10.5 and/or 12 month contracts, you can expect to make about $50,000 to $60,000 when starting depending on your contract length. There is also a shortage of school psychs.
With a PhD you can go private practice, work in hospitals, or academia.
Thats a rough explanation from a presentation I gave undergrads about school psych last year. PM and I can give you more info or research NASP (national association of school psychology)!