Bright, I'm glad the signing of the taxes is over and done w/for you. As for the conversation that your h had w/your BIL, he may have had some regrets and was voicing those to him, i.e., using your BIL as a sounding board at that time. Until the man comes to you and tells you that he's made some mistakes and wants to try to figure things out, I would continue as you have been moving forward.
Maybe the reason your BIL mentioned freshening up is because he was hoping that the visit w/your h may give him something to think about when he's away, i.e., you.
Bright, time is on your side. For now, your man is still lost and confused and it's going to take some time for him to work things out...but, it might not be a bad idea to let your h know when you want to use the condo in the future. It doesn't hurt to share your calendar w/him when it comes to the visiting the condo and for how long.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.