I would think that the spray foam is sticky enough to stick to the tyvek and be held in place on the purlins without any extra adhesive. The chicken wire sounds like a good idea.
When I built my pole barn I used the concrete board at the bottom to make it look like a foundation. I used the 4x8 sheets and cut them length wise for the height I needed and nailed them up and back filled to grade. I have vinyl siding on it above that.
MY shop is roughly 2500 square feet and I am planning on using t8 fixtures. They are the ones from Home Depot and are four bulb lights. Right now I have seven up and it is lighting the shop really nice. My ceiling height is 14'.
Pick up the eight foot fixtures that take four bulbs. I started installing four bulb t8 fixtures in my building. There is plenty of light from the t8s.
I recently got power to my shop and the lights I am using are t8 fixtures that are 8 feet long. Right now I have seven installed and soon there will be eleven more to go up.