I have a tenant that is a very large man and disabled. He requires use of a walker and cannot support himself without holding onto something or use of the walker. When he first moved in I allowed him to install grab bars on both sides of the toilet, in three places in the shower and on both sides of the bathroom sink, so he could ensure that he is able to safely get up/down and move around.  When he first moved in, both toilets came lose from the floor and required repair (within two weeks of him moving in). There were no issues with the toilet at inspection prior to move in. I footed the bill and repaired it with no questions/concerns. He then pulled one of the shower handles partially off the shower wall and I repaired that at my cost with no question. I also noticed that he's banged up the cabinets and door frames badly with his walker, but I haven't commented on that.Today he emailed me and said the sink is coming out of the wall and the shower handle is pulling out of the wall again. I have witnessed him pulling on things in an effort to move around and not using the grab bars that were installed for this purpose. He also falls on to the toilet rather than easing onto it. I only know this because he sat down on it when I was there looking at the shower few weeks ago (not to use it, just to sit there while I inspected the bathroom).The only reason I can imagine the sink is pulling out of the wall is from him pulling on it or using it as leverage when moving around the bathroom. He is a very nice guy and always pays on time, but these types of repairs are adding up and there have been multiple in the three months he has lived there. Any suggestions on how to approach the topic with him and how to handle it? I want to be sensitive to his situation but he has the appropriate amount of grab bars and I can't continue footing the bill for something he appears to be directly causing. Thanks!