It's been a week since your first post, so I was wondering how you are gettingon in your new house?
You mentioned this was your dream home that you were building, have you given some thought to why it was/is your dream home? Is it location, size, the fact that it has everything you wanted in a home? In terms of unpacking, I'm not sure if you have progressed with this, but start small. Focus on one room at a time, and think back to how you wanted your dream house to look.
In terms of the ending of your relationship how are you feeling about this now? I think you were fortunate to have made your realisation before moving in to your new home. Otherwise you would have had your partner associated with your dream house.
I think Jess has made a valid point regarding your friends. Of course your friends are going to be busy, but they are your friends for a reason so I'm sure they will want to celebrate you moving in with you. It might be worthwhile asking each of them to help you with unpacking, maybe not all in one day but across a few weekends. They would also want to know if you are struggling with the loss of your relationship. Have you spoken to any of them about how you are feeling?
The carpenter...If you think this has potential then go for it, what have you got to lose? Sometimes because of our low mood we think it best to put things on hold until we are feeling better. In reality doing these things can actually make us feel better. Do you have the opportunity to contact this person? Maybe give them a call or send them a text and see if they would like to catch up. They could be thinking the same thing you are.
Your new home will feel more familiar over time. At the moment it feels like a house but as soon as you start decorating it and creating memories in it it will start to feel like a warm inviting atmosphere.
I hope you will get back to us, I'd be keen to hear how you are going.