I think it goes without saying that you should get your system down with smaller paper. 8x10 is ok but often I find the working distance and exposure times too short to do any meaningful dodging, burning and or split grade burns and dodges. If I have to do an 8x10 from 120 film which is rare, I will use my 150 Apo-N to get more time and space to work.
As far as washing goes, I use a Eco-Wash 16x20 with half of the dividers taken out and just gently fold the already wet paper and put them in the wider slots, no more than 5 sheets in a run. I think 20x24 from 120 film is a fantastic size to strive for as in my experience, 120 film does not even start to really open up until 11x14 and 16x20 from 4x5. I bet that with some smart pre-planning and gradual expectations, one could be doing nice 24" prints in less than 6 months.
But you have to set your self up correctly in terms of the needed tools which is the right enlarger, lens, carriers and processing / washing gear.
Big prints are a blast to do and make you feel like you are really putting that negative to work, I love it!