There are financial assistance programs for Actemra that may help with the cost. I don't know how these programs work but there is a number to call in the link below.
https://www.actemra.com/ra/financial-support/assistance-options.html
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I currently do monthly infusions of Actemra. I have also done injections in the past. Either the injections or a monthly infusion should work equally well. I'm not sure what your doctor means by "consistency" of doing infusions. I suppose there are some additional variables to consider with the injections. The timing of my injection wasn't always consistent. I went from an injection every 2 weeks to a weekly injection. One time, I needed to skip a weekly injection because of an abnormal lab value.

I personally like doing a monthly infusion better than the injections. My injections were a "fixed dose" whereas my doctor can adjust my monthly infusion dose as needed.

Actemra is now a "trusted friend" and it has never been my enemy. My friendship with Actemra has lasted more than 6 years.

Prednisone was a good friend in the beginning but our relationship got worse with time. We completely parted ways about 4 years ago. However, my doctor says I should take prednisone with me when I travel.