How does one buy 100 of properties under a llc or personal?

[Allen Zhu]

Hello i'm a new real estate investor i know some things but this topic has been bugging me. 

Say someone has multiple properties i'm talking about 100+ how does one purchase them? do they use personal name to buy it or a business entity? 

Some people say it's harder to do the BRRRR with a business entity like a LLC because the terms are not that great.

Any Advice for me? should i buy through LLC? or Personal?