1.) When shooting video consisting of two people stationary talking back and forth, would a boom pole be an acceptable alternative to someone holding the boom?
2,) You can try regular mic stands suited for recording or live sound such as AKG, K&M, ...
You can also try using C-stands and place your boom into their clamps to hold down your boom parellel to the floor mounting over the area where needed. You can also use a small table/desktop stand placed inbetween the talents.
Cabellas has a fishing rod holder you can use with your c-stand and grip head. Cheaper than but almost exactly the same as the one at BH Photo. Also BH Photo has an even more expensive one.