The wig is well worth it imo. I'm wearing one while my natural hair grows out. They shouldn't be scratchy if you get a good one, but you also need to learn how to maintain it. I use a wig with synthetic hair and it should last for a while, but I have to be careful around things like ovens in order to not have any damage.
You could try to use fabric softener to really soften up those cheap wigs. They do tangle easily unfortunately
Wow! Now I can blend into the couch!