You need to be really good at time management and have to be able to bullshit to get out of conflicting meetings. One of the reasons I'm a bit scared to do it is the meetings.
I think 30 mins is a stretch, but I could quite easily manage 2 remote jobs right now, infact i'm looking for a second right now
There's nothing wrong with it, if you can realistically do it. If you can't, then you're asking for trouble.
You need to be really good at time management and have to be able to bullshit to get out of conflicting meetings. One of the reasons I'm a bit scared to do it is the meetings.