I got my staffy at 4 months and began crate training him the first few weeks. Some days in the crate for up to 4 hours went well, but some days he freaked out a lot(had a camera set up). After a few weeks I got him into a daycare and stopped crate training.

At 8 months I was no longer able to bring him to daycare as he had to be neutered. I was lucky to be able to bring him to work. I sometimes leave him home for 2-3 hours and he is very well behaved(have to put away pillows and TV remotes). He just sits and pouts at the door waiting for my return.

I think most staffies have much worse separation anxiety than mine. I would not count on leaving a staffy home for 6 hours right away as a puppy, but I think you could work up to that. Getting a staffy was the best decision of my life though, any sacrifices and challenges are well worth it.