Hello! I cant say how long since it varies with a lot outside influence and irl stuff that happens but to give you a rough idea, my last commission batch had an 11 person waitlist and I finished the batch in 3 months. Its safe to say I am able to finish 1 commission per week (altho last batch there were weeks that I took breaks and opted to focus on personal art.) It really just depends tbh but mostly I try not to go over a month of not making a commission done because I would feel bad ;;;
Hope that suffices, I'm sorry for the delayed answer, I check my dA rarely these days o//