Melgar, totally agree and that is the reason you should build/model the projects... because you want to, not because you will save money as the original poster kinda claimed. I just don't want people to be mislead that the hobby is too expensive and you can do "it" (whatever "it" is) yourself and save a ton of money.
In your case, if we compare a structure to a recent Menards building, it would be very difficult to do it for less then Menards, price wise. But the fact you did it yourself is the real benefit.
I am dabbling in Cardstock modeling and while the actual material cost is low, the time to build is high, but I still build them as time permits. I know non of my cardstock buildings will equal the Menards pieces, but I will have the satisfaction that I did it myself, which some might say is priceless.
Keep building.
Charlie