As an ex model shop employee, shops need to shut atleast two days per week for family time. Its soooo exhausting at the shop, as the phone rings and every customer thinks they are the only customer (forget about the job your in the middle of!), then someone comes in the shop to ask "How fast does it go, can you sell me one for £100?" and then break times come-by and pass untaken. Heck sometimes your bursting for the loo and its impossible to get to it. And whilst you've been dealing with Mr.X you've had another email for Mr.Z asking why you didn't reply within 10minutes, the Mr.X calls back because his wife saw his credit card bill and cancels his order anyway.
Working in a shop is a sure-fire way to quickly drown any enthusiasm for RC racing. Weekends come and its family time, time to unwind, time to escape the chaos. There isn't enough Margin to have more employee's which are needed, as the LHS's are competing best they can with you guys buying from China!!!