Oh come on, its L1, if you have any finance background (which I guess an MBA is), then its doable in 3 weeks if you don’t work (thats what I did very comfortably as was unemployed) or about 6 if working full time.
EOC + Schweser practice + Mocks + Past Papers. Rince, repeat. Don’t even bother reading the CFA books as way too much irrelevant text, that doesn’t get tested in the exam (esp. quantitative methods)
L2 is the monster, which I don’t think would be possible to do under those circumstances, unless you’re a mad genius.