Both my dogs are crate trained, we are going back to 8-5 hours?

I understand you don't want to give up your dogs and it seems like you're doing a good job caring for them while you're home. If you can't afford a dog sitter or daycare I would suggest trying to train them so you can let them out of their crates while you're at work. That way even though they are alone they still have some space to play or move in. If that doesn't work, still if a family member or close friend can come over and play with them for an hour or so while you're gone.