Tis pretty hard. Takes alot of time but anybody can do it if they invest enough time into it.
To give you an idea of the length it would take I have some cooking logs. Fishing and cooking are close in prof and avg time to fish/cook.
Time cooked level 2- 1hr 29m 14s
Time cooked level 3- 2hr 12m 33s
Time cooked level 4- 1hr59m.54s ( currently 77% - should take me a around 1/2 hour to complete )
Right now level 4 takes 5000 prof to complete.
I've been averaging 30m per 1k prof ( this is with getting good prof from cooking )
Each rank adds an additional 1000 prof IE rank 5 will take 6000 prof to complete.
If I had the same influx of fish tier as I've had i might be able to project each level length but projecting the unknown is hard for me
The skill level in fishing alone would have to be high. Rank 30-40+.
You'd be better off trying to be a trifecta skiller with
fishing cooking and suffusing.Just a rank 5-10 in all of them can make very very good fish.
and being good in suffusing means being very good at transmuting so you can make your essences rather than buy them. that is if you plan on making fg, not spending fg.