I'm starting the hunt to have someone come in and blow in some insulation in my attic. I'm in Arizona and have a prefab truss roof so there is plenty of room to move around up there.

There are some thin spots where the previous owner installed can lights and my contractor lost some while moving some walls etc..

What should I expect to pay to have someone blow some in .. Should I have them do it above the garage as well?

Also I had some skylights added and there are a couple 2'x2' shafts from the ceiling to the roof. Should I have them insulated as well ( I assume using the rolled insulation that can be stapled to the frame work)?

Anyone have a good idea of the per square foot cost of this ?