Thanks for the replies. I got someone out here today to do an estimate, and
he wouldnt give me an estimate cause he said my husband could fix it
himself. He suggested putting a 2*8 (the same size as the joist) the whole
3-4 ft span of the joist between the staircase walls, to use wood glue and
bolt it in. He said it only needed to be done on one side. I forgot to
mention the crack, I don't know if he saw it. The crack is not all the way
through the joist. He said the joist 'isnt as bad as I think it is' because
the damaged part is between 2 walls supporting it, and the walls are only a
few feet apart. He said he would be worried if the walls were farther
apart. He also said the bathroom notch is nothing. I would like to have
one more builder come out to look at it anyway. What do you guys think?