That might help you decide whether it's doable.
My first (and only) course was somewhere in the middle in terms of effort, and the courses I was most interested would have required another 50% on top, which wasn't going to work for me, between work, parenting, other learning etc.
It's doable, that's all I'm saying. But you will definitely need to be committed to see it through to the end, and you will be happy to have your life back when you're done.
CS7210 (DC) is the hardest class I took. We had to write a correct Paxos implementation, then use it to build a distributed sharded KV store. I remember having to spend 10+ hours on a single day during weekend. It was worth it though, learned a lot about distributed consensus, and how difficult it is to get right (there were test failures that were fixed after hours of debug, and the fix was literally changing the order of some code lol).