after daycare, dog didn't work out for boarding?

Has anyone had this issue and if so, how did you address it? Let me give you a summary of the situation I went through this past weekend. So an owner contacted me a week before her travel dates and wanted to meet with me to see if i could have her dog stay for two nights. After, we met up and set up a daycare 4 days later. The dog came over and was unable to settle down. He was an older dog so it wasn't normal for him to get excited and play so much, but I played with him as much as I could to let him settle down. It didn't work. I also went to the bathroom and he cried and freaked out as I left. It's usually normal for pets to feel uncomfortable for the first couple hours, but I didn't want to risk him being so nervous throughout his boarding stay. Also, I leave the home for 4 hours for school (I'm a full-time student and i let the owner know this before hand) and he seemed a little aggressive with the home as he started to rip things when I left the area for 15 minutes. I let the owner know that the daycare was good, but I didn't think the dog would be comfortable enough to stay in the home for boarding. The owner responded back disappointed but said okay and picked him up. She didn't want to talk to me and simply got the dog and left. I understand that she was upset and i wanted to know what other sitters would do in this situation? Also, I let her know that daycare is set in place for the reason that it may not work out and this is why I do daycare to see if the dog and I match.