It certainly sounds horribly inefficient. With my business I shut down a few years ago I shipped about 1600 shipments in 16 months while working a full time job with a lot of OT and still training 3 days a week with plenty of time to sit around watching tv on Sundays while also doing my own SEO, answering customer emails, looking for other product options, constantly monitoring competitors, manually cleaning 500+ pounds of LEGO pieces as part of an exploration at moving to another business etc.

(Never buy 500+ pounds of used LEGO pieces, ever, just trust me)