Long story short. A family member owns 100% of an LLC whose entire purpose is the ownership of a single commercial building. They were looking to get a loan to pay for a roof replacement, but I'm considering putting up my own cash in exchange for equity in the LLC.

So anything I should be considering here (i know broad question), and if I pay for equity in the LLC does that trigger capital gains on the building? I would assume no since the building is still owned by the same owner (the LLC).

thanks in advance