Chris, I think if you let it go without finishing it you will definitely regret it. If its paid for....then just sit on it and work it when you can. I know exactly what you mean when you say so much has gotten in the way for your progress....Look at mine. Seems every time I devote time to mine and get moving, something in life comes at me hard and puts me at a dead stop....but I've just decided to work it when I can and enjoy the time. I know If I give in and sell it, I too will regret it. So much hard work and time, You just cant lose all of that! Sooner or later things will line up for you and you will get to enjoy your dream car. In my opinion, its not going to be how long it takes, but the experiences and memories of the build is whats going to make it special in the end! Thats the true value of our cars!
Good luck to you in your investment and with your work.
God Bless,
Mitch