I definitely do not want to spend over $100 for electricity. And since my apartment is small, noise doesn't suite me.
It's very easy to go over 100 if you are running miners. What is your KWH price?
If your appartment is small chances are you will not like mining, as there is noise associated with most miners. (There is a antminer C1 using liquid that will be interesting on noise).As far as price normaly cloud is higher then hardware if you have the electricity, and it's decent priced. You can also look into hosting as with hosting you get are the owner of the hardware.
But either way 100 dollars is not hard to achieve with miners.