I like what Sprintcar said. I'm working on a list of what I offer & don't offer. I know from personal experience that you'll be doing all sorts of weird extra stuff if you don't make it clear from the get-go. Also because a lot of these extra things you don't do often, you won't do them well. This will lead to extra complaints. You'll be the jack of all trades & the master of none. The stuff you do offer must be done very well though.
There's certain things that I've found don't pay off for me - doing laundry, dishes, cleaning chandeliers, ironing, cleaning windows.
People will push you as far as you'll allow them to. Let them find another schmuck to be their slave.
I've thought about this a lot when my cleaning scope of work creeped to washing the family dog, picking up dog poop in the back yard, spraying the home for fleas after treating it. You get the idea! While you're doing these things, you think about the bad biz decisions you're making!