For Heritage Turkeys, just pick a color since their size is all about the same besides the Midget Whites being a little smaller.
They need a lot of space, for what you plan to do space wise that would be enough to get 4 of them to adult sized.
We maintain a breeding group year round of Bourbon Reds, a tom and 4 girls but last fall my older tom didn't object to a young son and 2 more girls moving in with them. We'll see what he thinks when March rolls around and breeding season starts up. Their indoor pen is 8x12 and their outdoor pen is 25x60-ish.
We grow out about a dozen a year, I have a 20x20 pen with a 9x6 shelter inside. I put all 12 in there once they're off heat. From there, I pull the girls out and sell them at about 3 months old. That takes the group down in size to where the space will be enough for the remaining boys, depending on what the ratio was. The sale of the girls pays for the remaining feed for the boys who stay behind.
We see a dress weight of 15-17lbs by 7 months old. For Heritage birds, I keep babies out of March/April hatches so that they're big enough and in the right feather for plucking by Thanksgiving. May hatch is pushing it and June is almost too late (they'll be full of pin feathers)
For hen raised babies, she'll need put up in her own spot. The toms can/will trample the nests. I incubate the eggs so that I can get those earlier babies.
They're quite driven to range, if they don't have enough space they may take that out on each other or you. Once a male Turkey fixates on someone he doesn't like he'll have a hard time giving it up. The more space they have, the happier they are.
I did notice that our Bourbons were a lot calmer than the Narragansetts we had, I only did the Narragansetts for 2 years, I like the Bourbons better.