Profile Evaluation - Low GMAT 30/F

Thank you for taking the time to evaluate my profile. Any advice would be greatly appreciated, thank you!

Age: 30

Gender: Female

Nationality: White, American

GMAT: 590 Q34 V38, 6.0 AWA, 4 IR, may take again but it would put me in round 3 for most schools (also unsure if I can raise score)

GPA: 3.17 Psychology from state school (upward trend, last 2 years approximately 3.7)
~3.1 various accounting and economics classes taken after graduating
3.5 graduate certificate human resources management, state school

Extras: Basic - misc volunteer work in and after college - worked habitat for humanity projects, food bank, fundraising, student research interest group, volunteering with troubled kids and families who needed help with disabilities (I worked full-time all through college so I had minimal time to do extras)

Work experience: 1 year working with disabled and troubled children, 5 years in state government taxation and accounting, recently hired as a human resources administrator and will have just under 1 year at time of matriculation

Area of interest: Consulting/Human Resources (specifically in green/sustainable business and technology)

Target schools:
1) Kenan-Flagler (sustainable business)
2) Kelley (design your own program)
3) Fuqua (stretch school, probably won't apply based on GMAT score)
4) Goizueta (organizational management)
5) Broad (human resources management)

I am also considering Kenan and Kelley's on-line MBA programs.

Background: I was abandoned when I was 16 and had to put off going to college in order to support myself. I then had to work full-time through college in order to provide for myself. I would like to include this in my essays because I think it demonstrates my determination but not sure if it's appropriate.