When I wanted peafowl, my Dad wasn't so sure but he told me as long as I took care of them and he wouldn't have to he was okay with the idea. We keep my peafowl at my Grandma's though and we did ask her neighbors if they were okay with me keeping peafowl. We know the neighbors and they liked the idea so that helped. My Grandma loudly said "NO!" when I said I wanted peafowl because they are well known by most people as being noisy birds. My Grandma felt bad for telling me no and she quickly told me it was okay. Now when my Grandma goes out to get her hair done or get some food with her friend, they drive around to the back and park and watch the peafowl in the aviary. My Grandma really likes watching them. My Dad is fine with them as well.
I wanted to free-range too, and that is what I did with my first peafowl. The neighbors liked it when my birds visited them, but I don't think mine were misbehaving. The neighbors told me they had people come visit them, and my peacock was in their front yard displaying to the peahen so it was quite the surprise for their visitors to see. My first pair ended up running away though and now I keep all of my peafowl in the aviary. I don't have to worry about them running away or getting curious and wandering off and getting lost. I also don't have to worry about them bothering the neighbors. It is a horrible thing to finally have peafowl and then have them run away and then have no peafowl. Very, very heartbreaking. That is why no matter what I do I always want to have at least a pair of peafowl penned - that way if the free-rangers run away, a predator problem occurs, etc you will still have peafowl.
The noise is an issue for some, and not for others. If you keep your number of males down you will have less noise. Often when one male calls, the others like to chime in which can get really loud if you have a lot of males. It is hard to say how much noise the peafowl you get will make. When they are young they certainly won't make a bunch of noise, but once the male is around 3 years old he will have his voice. I have 3 adult peacocks and one is very quiet and hardly calls, and the other two call about the same amount. What will be a really big problem is if yours decide to call a lot at night. That could really upset some neighbors.
In summary, make sure you have done ALL of your research, you may not want to free-range your first pair but you could free-range some of their offspring which would probably work better anyways since they would imprint to your property and imprint to you (hopefully), definitely talk to your neighbors about this now before you get peafowl and if you free-range be prepared that they may jump on someone's car and scratch it up or get hit by a car. Your Dad might not be sure, and most people only know peafowl as being loud, obnoxious birds. Show him that they aren't loud all the time and that you have done your research on them. If he still doesn't like the idea, look into getting peacock pheasants, Himalayan monals, crested firebacks, or any kind of pheasant because there are some really beautiful unique looking pheasants out there that have very wonderful displays as well and they aren't as noisy.