Hi Daan.
I don't particularly think it's a bad idea and honestly I think that some people's attitudes on steem about powering down is a little sanctimonious at times.
I thought about it for a while but because I'm a content maker first and foremost it woudn't make sense for me. I've noticed people who power down who are mainly creating content tend to loose a lot of support. I've recently branched out into hosting masternodes for a POS coin for some passive income and I wouldn't mind throwing some more into that if I'm honest but I don't want to jeopardize what I've built on steem so I'm not gonna power down any. I cut my losses on the various alt bags to find that project and it seems to have worked out so far.
Day trading is too scary for me but I do trade swings on a monthly basis with BTC stack. Done ok so far. Good luck with the day trading.
P.s. the leasing idea sounds awesome and with 50/50 I think it might be possible to make some money or at least break even.