Ah, a man that wants to stay poor forever
There is no time limit to quality but there is if you want to tie & make "some money" afraid 6 in 23mins is not going to enhance your bank balance too much. What with cost of materials, fly tying time you will not make enough to survive never mind maintain a standard of living. If you are doing it for "pin Money" fine but commercially I would say no.
Way I see it there are far too many flies from abroad especially Kenya & the far east. They in the main whilst not "great" tyings will more than suffice for fishing & at a price you or I can not compete with. Only way I see to "make a few bob" (dollars) is to specialise in something that is not readily available from the regular suppliers. One offs, local patterns for local fly shops. that sort of thing. Just my thoughts on the subject.
Tight Lines