Hopefully, she has fully recovered from this ordeal. Most likely, no, this is not a case to pursue. Good luck.

Countersue - likely not. You may want to consult with/retain an attorney to over see your interests.

Simply answer, yes they can (with certain caveats). Sadly, some lawyers will say anything to get a case. Your question suggests that, as there is...

No, it is (probably) not too late to sue. The exception would be if this were a municipal building.

You may have a claim against the agent, but that will be difficult. Contact cousnel. You may complain to the Insurance Dept.

Changed practice area to what was available. Consider speaking with counsel that handles ADA matters,

Well that is absolutely crazy. You should contact local/qualified counsel. Good luck..............

It depends on the cause of your fall and if there was an outside vendor, or the like. Investigate your workers compensation case as well. Best...

This question presumes that you do not have insurance. Owning a property this would be a requirement for a mortgage. Assuming you do not, or...

Most likely you have statute of limitations problem. Best to speak with qualified counsel. Good luck.