What does you husband enjoy doing in his spare time?
For one of my husband's birthdays we had a small family party at our home. He had really been wanting to go deep sea fishing, so we arranged for him to go with some friends. When it was time to open gifts, every card had money to go towards his deep sea fishing trip. He was surprised and we created a birthday that will have lasting memories.
You don't have to have a large party to say, "You are special." Have a party at the park-Freestone Park in Gilbert is fun because they have large hills that you can slide down with cubes of ice. You could have an old fashioned picnic with three legged races, sack races etc. Or just bring a football or frisbee for the 'guys' to throw around.
You don't have to pay for all of the food yourself. If you throw your own party ask each guest to bring a side dish to share. You can give them specifics or just have it be more of a potluck. I know it is still warm in September, as my birthday is the day after his, but outdoor stuff with his friends will keep the rowdiness outside!
If you need more help, just let me know. I love to plan parties and have lots of ideas, but I would probably be writing for hours if I shared all of my ideas. So, just let me know! Good luck!