[StephenSmith]

We occasionally get the homeowner to buy our product to monitor their GC - the GC always hates this. This in-turn leads us to recommending that the GC (if they're the buyer [most common]) to never share it with the future homeowner as that usually causes the GC to be overburdened by the homeowner.

I applaud you creating your own solution, many GCs can do this, but most can't or don't want to deal with it.