A.V.
As far as the solids, your milk should be primary til he's 1, so nurse first and then offer solid foods. He'll probably hit a growth spurt soon the extra solids may help you keep up with him.
My daughter woke in the night for a long time. I honestly can't remember when it ended. I tried a dream feed but she would still wake around 3 and be hungry. If I nursed her, it took 15 minutes and we were both back in our beds. If I sent her father to soothe her, she screamed and woke the house up. I decided that if she really needed to nurse at 3 AM at 6 mo. old, I could live with that.
You might also want to look up reverse cycling. It usually refers to working moms whose babies nurse all night, but maybe some tips will help you, too.
Hang in there. Honestly these days fly by so fast and you hardly remember all the middle of the nights. I have fond memories, just snippets, of sitting in the semi-darkness with her in those small hours. Try to remember that it's temporary.