How stable are 700k/year locums jobs?

There is one place in my area that pays 700k for locums at 40 hours per week. How stable are these jobs long-term? Could someone work these jobs for say 2-3 years straight? Or would you be replaced within months forcing you to find a new job? Would a physician working this job be able to purchase a $3 million house without losing sleep at night?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Psychiatry Source Type: forums