Sounds good and all, BUT like Jrb mentioned, the largest percentage of predator hunters cringe at the idea of spending a couple hundred on E-callers, so to expect very many to splurge a couple thousand just to possibly up thier odds while night hunting will be like pulling teeth from a pissed off rhino.
There is a large percentage of night hunters in TX., but I think that most other states will have a much higher percentage of day time hunters!