I would go with what's in your heart and budget. I like your 3rd option plan if you have the equipment or connection. I do admit just going all 10a production is easiest and cheapest option 3 seems like best of both avenues. And If your anything like me who's unsatisfactorily dumping tons of cash on a bandaid fix to a problem. You more than likely will have a haunting " if i only had" thought rolling through your brain. Production 10A parts are easy finds! Try option 3 then if it fails go to plan D... And then use the production would be replacements.