This is what you would be up against with the adze. More work than the hand held band saw, but much less cost. It comes with a learning curve shaped similar to the result you are looking for. A new band saw goes for $5000.00ish. The adze I use cost $35.00, new, the axe was free.
This was the one of the larger rafters, most took half the time this one did. The video was not edited, it is real time.