tatt2man
First of all you need to worry about healing from your surgery and not worry about what may come next, hopefully you will not need additional treatment. For me I am retired so do not have to worry about missing work but so far finished 8th treatment I do not feel tired and still playing tennis and going to the gym and I am also much older than you. I know guys on this web site who had their treatments and then went to work everyday without a big problem.
I think the biggest thing for you is the long commute for treatment hopefully if it is necessary you will be able to find somewhere closer.
Jerry1