I don't doubt this is possible, but it would take nearly limitless patience and grit to get done. More common is passing them over the course of a summer (4-5 months) before starting a job in the fall; I know several people who did this, approaching it various ways. But one colleague said he studied 12 hours a day, 6 days a week, and 6 hours on the 7th day. This is the kind of schedule necessary to pass that quickly and efficiently.
I took the process way more slowly; I graduated undergrad in May '19, and took BEC & FAR in July '19 and October '19, respectively, studying regularly over the summer (no job or other obligations). I studied for and took AUD in December while working, while I still had some down time during onboarding. I took a break for busy season and started studying for REG in late May '20 and passed just over a month ago in July '20. So I passed each test on the first try but it took me over a year.
Everyone studies and has success in different ways, I just wanted to share mine to show the other side of that spectrum, not as ambitious but still committed to it. If anyone has questions about my experience I'm happy to (and will haha) answer any questions!
BEC - 90 (7/19, 8 weeks)
FAR - 78 (10/19, 10 weeks)
AUD - 75 (12/19, 8 weeks)
REG - 90 (7/20, ~12 weeks, split up)
Ethics - 97 (~6 hours to go through the material & take the quiz)
Licensed in Virginia (10/20, ~1.5 weeks to process after submitting everything)
.