Not any more. Once a rich man's hobby, orchids are now within reach of any income. Modern methods of tissue culture and reproduction make it possible for growers to enjoy the finest plants at modest prices. You can spend as much or as little as you like. But you should be warned that trying to own just one orchid is like trying to eat just one potato chip.
Orchids do best if provided with air movement.
After all, in nature, orchids are subject to all kinds of weather. However, they should be protected from cold blasts of air from opened doors during the winter. It depends on the plant. However, most of the commonly grown orchids like the type of intermediate temperatures and humidity we try to keep in our homes. Most are very long-lived.