I sold prints for a while and printed them at home. I found it extremely stressful to be honest. As mentioned above, things just seem to go wrong! Like running out of ink, paper, or something just not working. Then there was the cutting issue, I would print on A4 and then cut down to 8x10, 5x7 or whatever, and this was just ridiculous. The amount of times I would sit for ages trying to cut it just right and making errors and starting again, ugh it just wasn't worth it! I do not know why I didn't think of cutting the paper first and printing straight onto it.... I/m not very computer savvy I guess! Plus- I only did black and white prints as my coloured prints did not look right at all.
If I were to offer prints again (for the moment I just sell digital pdf prints- MUCH simpler!)- then I think I would outsource the printing. This would probably mean buying a few of each print ahead of time and then selling what I have in stock. I don't like the thought of having to sort out the printing after the order comes in. I have always been reluctant to do this before for fear they wouldn't sell, and have been very conscious to minimise the amount of money I invest into such things. If I were to do this it would mean properly putting in the time and effort to market my prints. For now I am concentrating on the printable side of my business as profit margins are much higher.
Hope that helps a bit and doesn't put you off for life lol!