Re-enrolling in school/Pursuing Master's as fast track to CFO?

I'm a Senior Analyst with 5YOE in CF/FP&A (3 years @ a bank, 2 years @ a tech). I recently had an opportunity through a friend's company to spin up a strategy and FP&A division at the Director level that fell through due to the company being cash-strapped and prioritizing a more accounting focused senior role. I'm extremely disappointed, but completely understand the decision for their specific position.

Now, I'm feeling like I've got a chip on my shoulder to try and fast-track my way to leading an FP&A department, with the ultimate goal of becoming a CFO. I'm now considering returning to my undergrad (online, can do in <1 yr) to finish a second B.S. in Accounting, and then continuing on to a T25 school for a part time MsF program.

All in, this would allow me to continue working, recruit up to the Finance Manager level, and hopefully exit the MsF with a strong resume in <2.5 years positioned for a Director level role. Looking for advice on whether this plan makes sense or not. I'm not opposed to doing part time schooling while continuing to work, as I still have some 529 funds to spend, and don't mind the extra work. However, if my goal is to be in a Director level FP&A/Corp Finance position in the next 3-5 years, is this the right thought process? Despite my solid work experience I fear my non-target Finance-only undergrad will someday hold me back. I'm also not opposed to doing an MBA, but feel like I would rather "save" the MBA to do full-time for recruiting purposes in the future if this plan goes awry.

Appreciate any thoughts or advice.