Jon,
Small tid-bit within the discussion.
"Partial Lien Waiver" and "Material Lien Waiver" from each sub and GC for each payment during the construction process. Using signed inspections, bench marks, scope of work completed can be a basic guide. For example, a concrete company will provide a release right after the pour if pre/paid with smaller subs. These individual waivers protect you along the way. If possible plan walk throughs with the GC and trade in process just before the agreed waiver due date if possible with an extra set of experienced eyes. Not late in day or evening-morning time. You will learn a lot asking and listening while demonstrating an active presence. Bring a "Box of Joe" and bagels.
"Final Lien Waiver" from each sub trade when the contracted scope of work along with all Change Orders and Punch List* is completed. This included the GC. Hopefully there has not not been a lot of drama, bring Lattes
*"Punch List" If there is a remaining Punch List of items adherent to the GC and not so much to a trade holding a % or amount of $ from the GC leaves leverage it will get done and allows time to see what else may have been reasonably missed. Then perform a final walk through 30 days after completion and close out the balance. Bring a bottle of Champagne and personal flask of Bourbon, conciliate as needed.
Lastly,
-Insurance: Review Proof of Insurance from GC and all trades and be additional insured on GC policy.
Good luck
G