You would probably have good luck with the straw tunnels, Rhea. Your guineas are already laying in wheelbarrows and let you move their nests. It's also helped to create some safe places for a quick getaway when being picked (or pecked) on!
Yes and yes... on the pictures and videos. The differences are subtle and it's easier to tell when you see the two varieties together, but the vidoes with "Newbies" in the title are of the regulars or I guess "domestics" as they are called. The 3rd video of all of them chilling on the floor of the barn starts with a pan of the French Guineas and then the domestics are the last 4 on the floor. There is a male French hanging out on part of the straw bale. Both the domestics and French are of the pearled variety, but the French are a bit bigger, they don't fly well - preferring to hop up on things and sometimes gliding down. And for me they are MUCH quieter. Again, I don't know if it's because I raised the French from keets and the domestics were integrated when they were about 4 months old, or if there are truly differences because of the variety.
In the pictures, the four domestics are on the straw bales (there's one French joining them in the first pic). The domestics tend to go higher, have more energy, and like to pace the bales and along the roost. They would also roost on the crossbeams if we hadn't blocked them. My French just look up from down below and if you could read their minds I think they would be saying, "What are you? Crazy? Get down from there!"
I just found a site that sells Lavender French Guineas, but you have to buy 30 keets! I didn't want to commit to that many and am hoping to have my own French pearled keets here before too long. Perhaps if I had some of the neighbors sharing them, I would purchase them in another year. The hatchery isn't selling eggs at this point, but they are planning to make them available in a couple of years, so I might just wait it out and purchase eggs.