I am considering it. From a quick calculation (micro-production, 1 man operation, 50 units batch): - Materials: considering the best supported module (T-Beam

I am considering it. From a quick calculation (micro-production, 1 man operation, 50 units batch): - Materials: considering the best supported module (T-Beam V1.1 w/ NEO-M8N /w SX1262) with an OLED screen, an upgrade to a decent GPS antenna (ceramic, 28mm^2), 3D printed case and 2 Panasonic 18650. Materials cost: 48€/piece. - Assembly: pipelining would probably be bottlenecked by display soldering (outsourcing the 3D printing). Batching soldering could bring that down to ~1 min/piece. Flashing/testing can be fully automated and parallelized with soldering. Final assembly should be an additional 30s/piece. Start up ~10min considering testing machine boot and soldering iron warm up. Assembly time: 85 min/batch --> <2 min/unit Assembly cost (50€/hour): 71 €/batch -> 1.42 €/unit Shipping (EU): 10€ Support cost: can't estimate well, let's say 1€/unit Defective cost (10%): 13€/unit (2 procuct units, 3 shippings) Cost per unit: 73€ Retail price (40% margin): 102€ It's viable but pretty expensive (a lot more than 50$). For sure more expensive than a goTenna Mesh and offering less support. I won't make money from it but it could be a good learning opportunity. edit: formatting