SLAVA- You may wish to look up a thread posted by Blockhaus on makin wood buildings from cork & cardboard. He does some very impressive work.
If you don't want to take the time to lay skewers one on top of the other, I mght suggest three methods-
1.) Glue several skewers (or whatever you decide is the thing to use) to a piece of cardstock, the size of your largest wall. Sand the tops & bottoms if this is how the real thing was constucted. Then cast a mold from plaster or silicone, & when dry remove your original & cast several sheets out of plaster or resin. this way you can simply cut & paste the walls together as needed. this should save a lot of time.
2.) glue a sheet of cork to a sheet of cardstock. make a jig of several concave radii of the same interior diameter as your "logs". You can make this by casting like the above example, gluing several lengths of tubing split lengthwise to a plate, etc.. Then Glue some medium sandpaper to the inside of the tubes( glue it nice & flat so it conforms to the curves) and run this back & forth along the cork sheet. Use a straighedge as a rest to keep it uniform. repeat as necessary to cover the sheet. if you use successively smaller grains, you shold wind up with a relatively smooth surface. when you achive the desired result, coat the cork in a heavy artist's medium to seal out the 'pebbled effect', then scribe woodgrain as required.
3.)Invest in a set of LINKA timber moulds:
http://www.linkaworld.com/Ordering/PayPal_Order_Form.htm Cast the blanks & combine them as you see fit. This is most likely the quickest option, but will cost you more up front. Time vs. Money. Your call.
Whew

long post, But I hope it helps...
Welcome to the Big A, btw!

RobH