There are various other items that may come up such as: Proper firewall suppression, adequate entrances/exits for fire safety, stair safety, size of kitchen appliances, etc... for my specific example. 

This is NOT Business Credit.By establishing a separate corporate credit profile on the EIN Number (separate from the business owner's SSN/FICO), investors can access substantial business credit lines, capital for property acquisitions, and renovation funds without personally guaranteeing the debt.This approach creates a powerful financial firewall between personal and business assets while potentially generating a significantly larger (ROI) through reduced interest rates, increased borrowing capacity, and the ability to scale investments more rapidly.The education gap surrounding EIN corporate credit means savvy investors who understand and implement this strategy can gain a significant competitive advantage.

Every webserver, firewall, router, modem in everyone's house.

An LLC does not provide much legal protection, it acts as a legal firewall to separate assets.

Think of them as a firewall protecting your other assets if one has a loss.

I learned that separation wall for a duplex could be a fire wall.

The biggest benefit of the LLC is in being able to have a sort of firewall between your companies and self.

With the government storing so much information, hackers are constantly trying to break through firewalls. 

I attribute it to having to  learn new skillsets (such as firewalls) and the market in general.  

A properly-formed, properly-operated LLC is like a firewall for liability: everything inside might burn to the ground, but the fire won't get to things outside the LLC.