I'm not quite sure if I missed something here. You're comfortable having two mortgages, 50k+(presumably low-interest) bank accounts for biz and personal all with Chase who you have been with long-term. But...

You are financing a 400k renovation with gc? The risk/reward doesn't seem to add up here. Are you churning the gc through Chase as well?

Yes, buying GC at office supply with an Ink is MS. You are in the MS forum and have been for over a year.

I don't have a dp for being shut down, but I know our relationship with Chase changed significantly with churning activity. I really don't think the algorithms will care about your mortgages or bank accounts. They will care about your MS activities. The biggest questions for me are: 1.what is your current spend level? and 2.how different is 250-300k/yr from that number?

It's possible that this will work for awhile, but even if Chase doesn't mind the volume for some reason, I would definitely stop applying for/converting cards. If there is a real business account there I think about the consequences.