Home Improvement Questions? Ask a Handyman for Answers
Hi. Are you crazy, well it can be done be that would not be my first stop. It is low cost in a sense but it is hard to compete with commodity material and technique (it also require more equipment to manipulate the "poles". The finishing in the interior would cost about the same as in a normal house of the same size, there is not much different unless you also want to try alternative interior finish.
Yes Metal building can have more condensation and insulation problem because they don't have a progressive thermal gradient. As the gradient is very sharp because metal conduct heat easily, condensing can occur more than more insulating material. insulating expending foam can help a lot with that.
The house within a house concept increase the cost and you can also have problem with condensing if hot air from the outside get between the two walls.
In Kansas (because of tornado risk) and your love for clean span open space, i could see a possibility of a geodesic dome house if you want to go in crazy territory. They also have problem with hot air but that can be solved with a cupola on top.