And the fact is that if you roll over your tax credits to pay for the next year, you're technically never getting reimbursed for that first year's coverage.
Its kinda like back in the day when I sold weed. There was a buddy of mine who wanted me to front him a 8th each day, and each day he would pay me back for the previous day's 8th.
He got super mad when I pointed out that technically, the way this worked out was I would be out an 8th permanently, that I never actually got paid back for. The first day's 8th is just a write off, and each day's "payback" on the previous day's 8th was really just paying for today's 8th.
That's basically the situation you have here. The first year you pay in, you're out a cool 8 grand. There's no getting that back. THEN, you get to apply a 7 grand credit towards NEXT year's 8 grand cost. You're still out another grand though.