Since you have not got a response yet, have you asked your palm nursery? The fronds would probably not be a problem but the root mass might be. As I am sure you know if you have to move them later the expense would be staggering.
I have a lot near me in which the spacing between the Queen palms is 3 ft between the trunks. The upper fronds share the same space & create a nice view. They are about 30-40 ft tall. The nice thing about the close spacing is it creates a barrier; a car or motorcycle can not drive through the palms, which might be a problem in the lot.

I just planted 10 in my yard today. I have been wrestling with this question. I drove around town and noted how much space mature queen palms seemed to need. I planted mine approximately 15 feet apart.

Hi I am planting 3 queen palms in my back yard alone the fence line and pavers, My question is how much space from the fence line and the pavers do i need to have for the roots to grow?