Just to further the math part of this conversation, given that heavy data tether is in the ballpark of 20 lbs. per 1000 feet and then you add to that a payload that approaches another 20 lbs., the Bib we know can't handle that kind of weight at 2000 feet. Even a 25 lb. total weight is really pushing it. At 2000 feet however, the line of sight extends to 50 miles. This is certainly an asset in a rural emergency communications environment, especially if it gets you to the nearest cell phone tower as a repeater. Now, at 750 feet, even with a weighty tether, there's still the potential for a very usable under 10 lb. payload for video monitoring, assuming wireless video feed - day or night vision included. A 33.68 mile line of sight at that altitude seems more than adequate for most applications.
bank