It,s kind of like launching a successful startup. It used to be a struggle for me as well, but having more open time has given me more opportunities to work on it.
It,s still a shitton of effort, not a walk in the park, but it,s also fun and rewarding.
That's pretty much in the same category as "win the lottery and live off the interest"
Many people struggle and fail to achieve one romantic relationship, let alone several simultaneously.