At the moment, the citizens of Klondike are strongly engaged in the modernization of the Home Station.
Because of this, you can experience a lack of tools and important materials. You can get hammers, saws or trowels:
1) in a daily Bonus,
2) by completing orders from Sir Chaney,
3) for completing Trader's orders,
4) as a reward for completing tasks,
5) in chests scattered across the lands of Klondike.
Note that Sir Chaney doesn't come every day with orders (he doesn't like queues)... But if you complete orders from other characters, every 5th or 6th order will be from Sir Chaney.