If I take the conservative route and assume that the haram act was twice, thus 120 days would be required. Is it 120 consecutive days or two separate 60 consecutive day events? Also, remember you speaking of a limit (or amount of expiation days considered impractical?), but I can not find it in my notes. Can you refresh my memory?

You can take a break after the first set of 60 days.
So you don’t have to fast the 120 consecutive.

There are some scholars who believe that one expiation is sufficient for a person who did the acts several times due to its difficulties of fasting 60 days for each incident.

I personally say to try it and after the first set of 60, if you feel fatigue, you can just do the money for the second set of 60.