I waste my time have other commitments I can afford to hoard. I will eventually cull to only premium I really just spend my time educating myself and see it as a hobby. If I can man the phone so to speak I will take it more serious right now I am so busy I am making little efforts.
Maybe a more interesting question can be, how much do you spend for outbounding. I spend 5 minutes per day for outbounding, just to promote one domain to one company just after registering. But maybe must work full time, for one month, just to be able to sell more domains in the rest of 2020. People don't immediately buy after outbounding, some wait until domains go into redemption and pending delete: very annoying.