What do you think I should do about this gorgeous cat?

I started feeding him, once a day, about 5 mos. ago and now it’s getting towards freezing temperatures and I am racked with wanting to nab him or build a little home. Only problem is I don’t want other cats, raccoons, or possums to move in to the shack and scare him away. He is my cat, “Seven”, and I am worried sick about him. Any advice?