Maybe I misunderstood... I was thinking this was about fall protection while using
staging, ladders, pump jacks etc. Were you planning on using this to somehow rappel around on the walls of your house?
Shazapple, is right about proper training, equipment and anchors. There are some very good fall arrest kits, which include everything you need, on the market (for use as fall protection while working on ladders, NOT for rappelling) but training would still be key. Even something simple as putting the harness on is not intuitive. Having someone who could train you would be most helpful. I think the complete kits run about $150. That said, I've only ever seen them with roof anchors. Maybe some other kind exists, but I don't know.