With a low undergrad GPA, is it worth it to do a second BS?

My undergrad GPA was something like a 2.9 (wasn’t serious), GRE math 720/800, verbal 420/800, writing 5/6.

I want to switch fields, and so I’m wondering if spending 2 years of time and tuition money (~$24k minus any scholarship money I can get) taking courses that would amount to a second BS degree is worth it or if I should just go straight for an MS.

The GPA for my second BS would be 4.0. I would be able to develop a documented interest in the new field and get work experience to build a stronger resume over the two years. My thinking is that all of this would amount to better MS opportunities – better schools, better funding.

Am I right or would admissions look at my history and ding me for having two BS degrees? Or is the low GPA not as damaging as I think it is?

If there is anyone in academia on here, I would really like to hear your thoughts on this. Thanks.