You have enough spend to hit it, it would just take a very long time for you to manage the cards. Maybe it's fun for you. If it's not, I don't think it's worth the time. The best business SUBs require about 10K-20K spend and award 100K-150K miles/points. With 200K spend a month (assuming subs are at 15K spend and award 125K points), you could feasibly hit 13 subs every month.

That's about 1,625,000 points every month. Doing this, however, would require at least 5-6 "players" (people who will let you apply for CCs on their behalf). I did this for a month on our business and gave up mostly due to the people in our accounting dept that told me this was not tenable. I'll send you an email right now.