One of my concern is what are the legal ramifications if a child was to get injured from it.

They will have to provide expert testimony that the uncle was injured or killed because of an inherent fault in the rail's construction and NOT because the victim was drunk and careless.

The tenant or other injured party would just name you as the defendant in any lawsuit.

If so that's another plus.If you want to be a landlord and avoid risk, you'll fail, people get injured, sick, die, divorced and even tossed in prison, so just because they can jump through all the hoops today with shinning ratios doesn't mean smooth sailing, OTH, these things may not happen, you just never know.

basically anyone doing this type of work on your property should be covered by workmen s comp insurance.. if he gets injured, falls, he'll sue and your going to have issues,, better to hire a service that does it on a regular basis or get workmen s comp added to your policy for this.

You don't want a handyman to get injured falling off your roof and then come after you for medical bills because they didnt carry the proper workers comp/ liability insurance at the time. also protects you if they do a bad job and you have recourse with their insurance company if they damage your house or make the leak worse....

If the property owner gives the go ahead and the tenant is injured in the process, is the property owner liable?  

I certainly would not want a nightmare with the first property that I buy in my local area and would absolutely not want to injure a child because of my negligence.  

I have two disabled dogs (one is blind, the other is partially paralyzed) and this branch could have injured them had they been out there when it happened.

That lawsuit is a claim for fraud, and that’s what fraud typically is...a misunderstanding and someone being “injured” and wanting to hold the other responsible for it.