I have a tip that works really well, but you have to invest some time into it.
First you need a work bench in your house, rings of dualing, house tele tabs, and the hot air balloons unlocked from castle wars to varrok. You also need oak logs that you will make into planks and a willow log to get from CW to verrok. In short you use the ring and balloon (the balloon lets you off right next to the saw mill) to get oak planks really fast, and then you use the CW bank, home tele tabs, and your work bench to make oak stuff in flat pack. It is the fastest way there is to level construction. I talked about this on one of the episodes (I think it was 16), so you can look it up there for greater detail.