Hi @Spark1 -- some of us think peafowl make wonderful pets! Sometimes neighbors are not so enthusiastic. Males are downright noisy -- listen to some youtube videos -- and they can put out a lot of decibels when they are thinking of mating. Enough to really hurt your ears if you are near them, and sometimes loud enough to be heard a mile away. If you work with them a lot as chicks, you can tame them well. Most people just let them be rather than make pets, but they can be pets if you are willing to put in the time and be patient. Be careful, though -- they are large birds and can sometimes accidentally frighten people in their friendliness.
It sounds as though you have enough space, but not enough height if you need them to stay in one spot and not get on the roof or into the neighbor's yard(s) -- where they will cheerfully eat the flowers, btw
Peas are very strong fliers, so if you want to keep them contained, you must have a roof over their pen -- netting of good quality works fine. You must never, never clip the wings of any peafowl, it only creates more danger for them and prevents them from escaping danger.
Dogs are different -- some dogs are fine with peafowl and can be taught to leave them alone; some dogs can not ever be trusted with peas. It depends on the breed, the training, the individual dog. Unless you are absolutely certain the dog poses no harm, then better safe than sorry -- keep the birds safely penned.
Even if you ultimately want to free range your peas, you will still need a safe, secure pen to keep them in while they are getting acclimated, and where your hen(s) can stay during nesting season to keep them safe. You will also need some sort of shelter, depending upon how severe your winters are. The cost of housing and pens typically outweighs the cost of the birds and their feed.
Peas need a high protein gamebird feed, and perhaps some catfood -- you might try pricing those at your local feed store. (Catfood, of course, you can get anywhere.) It is also best to do preventative care such as regular worming.
There is quite a lot of good information on the peafowl stickies here:
https://www.backyardchickens.com/t/389059/peafowl-sticky-topics-index
You should read those, and then see what questions you have left.
Good luck! Hope this helps you decide. And WELCOME TO THE PEAFOWL FORUM!