Thin,
Serious seems to be the key word in your post. Runners, dishwashers, and various hang around types are pretty easy to find. For the record, I have a teammate, he pays half of contest expenses, but our commitment levels are very different. I own all the equipment, do all the practicing and generally get all the headaches. I appreciate his support, but like everything, it comes at a cost. When you accept that support, you have a certain obligation to that person and their wishes. Our team has struggled this year, after enjoying modest(very modest) success in the past, and it has certainly put a strain on our relationship. I guess it depends on how much are you willing to compromise vs whatever benefit you feel an additional team member will bring to the table. I assure you there will be conflicts, a decision will have to be made, and no consensus can be reached......then what?
Just food for thought.
ML