I've been following for a while, really love the Beekeeper Studio! But I always was interested, how do you evaluate the market and your income? Would you advice

I've been following for a while, really love the Beekeeper Studio! But I always was interested, how do you evaluate the market and your income? Would you advice to join and develop tools for the desktop? Is it your fulltime job? Does it take a lot of time? Thanks!