https://bushfarms.com/beestopbarhives.htm
Most of this can be scrap. Usually you have to buy the sides and maybe the ends, but all the top bars are from scraps. Advantages are natural comb (which you could get from foundationless frames) and no lifting (which you could get from a long Langstroth hive). But you can build this frame scraps with just a skil saw. Even easier if you have a table saw.