New Real Estate investor w. terrible credit...where to starts??

[Don Draper]

I am in the Tampa bay, FL area. I am looking to invest with the BRRRR method. My goal is to create affordable housing for the elderly. I am looking to use an LLC. and I understand that it will take some time to build a strong business credit score, however, my personal credit score is somewhere near 550. How can I get into the game in less than 6 months with a low credit score? Where do I start, what is my real time line? How difficult is it to find a quad or triplex in Tampa that can be house hacked? What areas of Tampa bay are good for purchasing quad or triplexes?