Welcome to my guide! It's a simple achievement so it won't be too detailed. The best thing to do when trying to get it is to be very thorough when interacting with everything. If you can't find certain items, you can refer to the guide or the video below.
https://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=3193429361

This part is the easiest. Simply interact with your family twice, the fence, and the van before going inside the house.

This is where most people get confused. Before interacting with the rental man, all you need to do is interact with the front door a couple of times then go talk to him. Afterwards, go through each room and interact with everything possible at least twice just to be sure. Don't forget the front door and all of the interactable windows!