Even though I retired in 2009, my nurse brain kicked in when I saw this question. I would imagine you'd need an implanted port if you went this route. This is a simple surgical procedure. After implantation there is a bit of a waiting period. Once cleared for use the needle that is inserted into the port has to be chnged on a regular basis. The biggest risk anytime you puncture the skin is infection. This is true whether the medication is given subq or through a port. However, a port infection comes with its own risks since it goes into a large vessel closer to the heart. I know this particular medication can be quite painful. Typically, you won't experience pain when the medication is given through a port. I'd suggest talking with your doctor. For people requiring long-term medications, this may be a good option for you.
Thank you!