FWIW, I bought a 2400 recently, and you can queue up a series of images to print, then go make coffee (unless you are using really heavy gauge paper, like Hahnemuehle
PR 460gsm, which feeds one sheet at a time). The 2400 even takes a roll-feed, which might help. So you don't have to watch it print.
Can't help you with the online services - I'm in another country.