RAW ADVICE AHEAD:
Ok, moving to a state with a high IS acceptance, I see your point, sounds solid. Thoroughly research those schools though - some of the newer Texas schools are a little risky, solely because they're new.
Nail your MCAT. Even if the state schools have a low average, you can't afford to do bad - you're non-traditional. Don't get anything shy of a 512, and a 127+ in every section. This will make medical schools suddenly want you.
ECs: get some clinical care, EMT is great, but also throw in some hospital volunteering as well as non-hospital volunteering. You'll most likely need to do some form of shadowing to "show your dedication to the field and you've observed how a doctor see's patients, works with residents, writes notes, etc."
If all goes well you'll have nailed it.
