I have a PhD in Clinical Psychology. I attended a large university, and my tuition was waived and I received a stipend for the first five years in exchange for whatever I was assigned (mostly teaching undergrad classes, but also some practica). My salary doubled during my residency year, and that only brought me up to $26,000 (before insurance and taxes). Even with my stipends, a grant, and annual scholarships, I did not escape debt free. I don't know many people who do. Moonlighting was prohibited in my program. The stipend helps, and it's one of the advantages of APA-accredited PhD programs, but from what I understand PsyD programs can be pretty costly.
Though you previous therapist made $150 per hour, that statement is an oversimplification. I'm sure you're aware of the costs incurred as a psychologist in private practice - space, billing, liability insurance - as well as the substantial time it can take to build up a client base. That being said, good luck to you!!!
A visit to the studentdoctor forums would probably be helpful if you're hoping to get information (as opposed to opinions or feedback on your decision).