$50 is insane. You're looking at $5 of fabric and hardware and what, 6 dead straight seems to sew? I wouldn't pay $50 for that if a charity for the blind was selling it. A 6 year old could make one of these in a day with any functional home sewing machine and YouTube.
My Spidey senses tell me...
If you truly have the fitness and the willingness to put in the work IMHO you're putting too much effort into the wrong question. Pick a unit with a 7% success rate and out scout/work 93% of the competition. Time spent choosing a unit is time wasted thwt you could be scouting/working that land...