got a dilemma with a friend

I think you did nothing wrong if anyone had wasted any ones time it was him, granted he reorganized his schedule to do your stuff, but if he had not dicked around in the first place or contacted you he wouldn't have had to do that or you could have found someone else. You have the right to change your mind it's your home [he's just pissed] he'll get over it, next time I would just do it myself of hire a non friend contractor. Remember the best 2 helping hands you have are at the end of your arms!!!