1. Which type of aircore would you use (aircore 1 or 2)? Why?
Would use #2, bit stronger and easier to work with with gloves on.
2. What length of aircore should I cut for each tieout? (front ridgeline and corners, rear ridgeline and corners, center side).
Would depend on tarp size and configuration you plan on using, found that 3 long sections and one section of cord about 6' cut into 1 1/2' section tied together gets the job done with lots of various tarp pitches
3. What do you think of the proposed set up? suggestions...thoughts...
Depends on the conditions your out in, clear warm nights simple aframe will work, full on storm go for flying diamond with exposed high end going opposite direction of incoming weather