Last year we had a 1st grader who was struggling with reading. She was getting special tutoring at school plus in the special reading group. We worked with her at home. She hated school.
We decided to homeschool her this year and WOW, she flourished! At the beginning of this school year she didn't know her months of the year or days of the week. She could BARELY read a preschool book.
Now she read two chapter books!
Our key was finding things she was interested in reading. She likes fantasy and mystery, not the boring stuff they made her read at school.
Also, her vocabulary needed work. Whenever kids come across a word they don't know the meaning of they lose interest in what they're reading (adults do too). So whenever she was reading we'd make sure she knew the definitions of ALL the words she was reading. If she started to want to quit, we'd go back and find the word she didn't have a definition for. It works EVERY time! I'm talking every time. Try it and see!
We didn't do any kind of boxed curriculum with reading. We just helped her pick books she liked and then worked very slowly through them. Her problem was the books she could read were baby books, and the ones she wanted to read were much too complicated for her. Try the Secrets of Droon series. My daughter LOVES those books, and they are definitely good for a beginning reader. She was so proud when she finished reading it! It took us a looooong time, just a few pages a day. We'd go back and read to her the part of the chapter she had already read (so she could remember what happened) and then she'd read a few pages alone out loud. When she finished that book all by herself she was so excited that we had to go out and get the next one that day!
We also keep a picture dictionary nearby and we write down and define all the words she doesn't know. Vocabulary was the key.
We've been homeschooling for a year and LOVE it and will definitely continue. BUT I'll have to say it's not for everyone. Why not work with him over the summer and then make a decision? I'm definitely a pro-homeschool person and can help you with tons of resources if you need them. Still, I firmly believe that one kind of education does not work for every child.