Moemoe, this may not be a crucial point but it was important to me. Whether you do wood flooring, wall or ceiling a la tongue and groove, if you can choose the season you do it in it makes a big difference. I did 3,000 sf of flooring in my house. If you buy your wood and install it in the winter for example, in the dryer season it'll shrink and you'll have gaps showing up. That's not too bad. What's worse is buying and installing TIGHT in the summer. When it swells, and it will, you'll get waves in there. If you can buy your wood and leave it out in the room that it's intended for for a while, the wood will climatise a little and give you much fewer problems. Between seasons is the best time to do it.
Just my coupla cents. Good luck.