Including shipping and assembly a 9 5/8" langstroth box with ten frames costs me under $25. Cover and bottom board about $5.00 for the pair. Looks like your equipment is less expensive than mine.
Sounds so. Mine has just 8 frames and I don't know whether these are medium or smaller ones. Quality doesn't seem to be very great, but I can't complain about it for $5, right? Hiring a carpenter to build one will cost at least $40-$50 per hive. Problem is finding timber for the material, and a carpenter to do it. I don't know the price at any beekeeper's clubs though.
I make all my equipment. I make medium supers for $4, deeps for $6, bottoms and tops for $3 all out of pine. I use Plywood for nucs and swarm traps for about $3 a piece.
Great! You should be good at carpentry skills. The beauty is you can choose the wood yourself and have a detailed customization.