I am designing a human society that exists in the near future. After the development of mass-produced, relatively cheap lithium-sulfur batteries (superior energy density to lithium-ion), electric vehicles- particularly aircraft- become much easier to engineer, as batteries are not nearly as heavy and can carry a longer charge.
As the society exists in extremely difficult terrain, the military funds the development of low-cost, battery-powered helicopters. These two- or four-seater helicopters have decent range (350 miles or so), and are small, light, and (relatively) simple to operate and maintain, and cost less than (the modern equivalent of) $70,000 apiece. They are primarily used as a cheap and easy method of transportation or for reconnaissance, being too small for heavy weapons. They are quite common and (ideally) intuitive to fly, even to one with minimal flight experience, so much so that a streamlined mainstream model becomes quite popular with civilians living in undeveloped areas.
This article makes it seem like electric helicopters are potentially feasible, even with lithium-ion batteries. However, my understanding of helicopters is that they are not easy to fly and are usually quite expensive due to complex mechanics. This helicopter, which seems similar to what I'm shooting for, costs over six times what I'd like mine to.
Are cheap, dime-a-dozen electric helicopters possible to manufacture?