I practive on my acoustic after work, when everybody is gone. I practive on my electric in the morning, before work, when I'm alone in the house.
I have a very affordable Fender Champion 20 amp (test winner -- $95.75 with free shipping via Amazon Prime), and I just barely have to crank up the volume to get a decent sound out of it. (As a side note, I will sell it and buy a Yamaha THR5 instead.)
I live in a mellow neighborhood with plenty of space between houses, so no of my neighbors can hear me. I would resist the temptation to play louder 'til it sounds "really" good . . .