Me and my husband are looking into opening a party supply business. We were wondering if it's a good investment?

First its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread.

You need to first check the market. A party supply business is a good biz, but if the area already has established competitors it may not be the best choice for you.