Have fun Cookie, but until you teach them to draw force diagrams, you
will have frustrating conversations.

I am a practicing aerodyanmicist, but will refrain from speculation on
the tow conditions discussed here. But I will suggest to anyone
trying to figure out what the required lift is, that they draw out the
forces in what is known as a force diagram. Also known as a free body
diagram. http://en.wikipedia.org/wiki/Force_diagram

In un-accelerated flight, which includes aerotow at a constant speed
and climb rate. All the forces, including gravity must add up to zero.