Jobo processor is probably the best choice these days I got a CPP3 and use it in manual mode , the new one from Cat Labs is one I could recommend. You are talking about processing for others which is a very demanding commitment. It is almost impossible to screw up . Personally I would steer clear of E6 for clients, but you will be the judge on that one.
Stay away from the Auto Jobo units, no matter what anyone says, the lift arm goes after a set number of lifts and replacing it is next to impossible, I see them all the time for sale
and I cringe thinking about the poor soul who gets one. I bought 1 new back Alt 2300 in the day and 4 used Alt 2300 which all lasted very short times, all had lift arm failures. I figure the first unit had its full 36 thousand lifts then failure, all the used units had various lift counts which caused eventual failure after a set amount of lifts.
No more Auto, for me,
Roller transport units are on the market, and would look perfect for home use, but they are notorious for scratching film.
Bigger dip and dunk are too large for your home.
Basket systems work well, I used both BW , Colour Basket in College with good results.
Stainless steel reels, and tanks are in abundance.
So this would be my second choice for your situation.
For my personal lab I am considering a larger dip and dunk unit.