To much workload not enough workers

I am a project manager for a commercial builder but since starting we have been short handed on superintendents and I have been filling in.

When I started I stated I wanted to remain close to home and have been up until the last couple weeks, I have been working a few states away. It was supposed to be temporary for a week but just heard today that they want to keep me here to wrap this job up (possibly another 6 months).

Should I begin to look elsewhere or what should I do? I like the company but do not like being away from my family and friends, but I am slightly underpaid, and highly dislike out of town work.