Do I understand you correctly? On weekends, a retiree who has spent a working week cleansing from 5 to 15 apartments made per week, for 1-2 hours each, and spends from 5 to 30 hours on it, right? And you meant exactly the retiree, and not some biological robot there with increased strength and wear resistance?
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Maybe I'm a bit out of the subject, but judging by what balloons the fragile retirees pull and with what force they push in the subway, the retiree and the biorobot with enhanced strength - it's somewhere nearby.