Let me start this discussion by pointing out that some roses are protected by plant patents. David Austin roses and many Weeks modern varieties fall in this category. It is illegal to propagate roses with plant patents. The large rose producers need to protect their investments in roses with plant patents. That said, many old garden roses, polyanthas and miniature roses do not have plant patents. Do your research before propagating roses.
I am not into budding onto rootstock, but I have had modest success with starting hardwood cuttings in fall. I credit my success to the continual rain in the Pacific Northwest providing the outdoor moisture. My method is simple: hardwood cuttings, rooting hormone powder and small potting mix filled containers. Roots form within two months but the starts will not be potted up until next summer or fall.
Hardwood cuttings 10/9/16 (left) and hardwood cuttings fall 2015. (Right)