Metformin is dirt cheap. Test strips range from about .50 to over $1 each without insurance, from what I've seen.
If you're quitting and can adjust your income, you really need to wade through the plans available to you on Healthcare.gov. If your income is less than 200% of the FPL ($34,840 for a family of 2), the silver plans with the cost sharing reductions are quite good, at least in our area. The plan we picked offers 3 free primary care visits free, and copays of $4-20/month for meds (even for one of mine that's $700/month on GoodRx). We don't even need to pay any deductible unless we have something done, like surgery, or an ER visit.
BTW, preventive care is covered free under the ACA. Even with a bronze plan, your annual physical, mammograms, screening colonoscopy, and flu shot should be free. They may bill you for some blood/urine tests, though.