[kmoser]

"I can work on a team but I prefer working alone [...]" This to me is a red flag. Unless you're already pretty experienced, and have a large client base (or a small number of clients who keep you busy), it's nearly impossible to take on exclusively projects where you're the only developer. If you have the luxury of turning away clients with jobs that involve working with other developers, great. But most likely you're not in that position, and would be doing your clients a disservice by trying to do something alone that would be better served by working with other developers.

tl;dr Don't try to be a lone wolf. In the long run it hurts you, not to mention your clients. Learn to work with others.