Does it have to be the new Marriott card?

Do you already have the Marriott business card? If not, you could apply for the Marriott business card today (and in fact it may be discontinued soon, so why not today), since it's not subject to 5/24 (ie, it's one of the few cards that Chase doesn't check your 5/24 status when you apply). And you don't have to have a business to apply for it, just give the standard no-business answers (your name as the business name, your address as the business address, your phone as the business phone, sole proprietor, minimum years in business, no business income to date, and if they ask for expected monthly spend estimate what you'll spend the first few months based on the signup bonus requirements.

And the other great news: Applying for the Marriott business card now won't mess you your 5/24 status. Because business cards you've opened don't count toward 5/24.