Here is my idea that I recently came up with concerning modeling. I want to build models for US Military members, active and retired, and their families. Quite a few members of the US Military who fly aircraft have models of their respective steeds sitting in their homes. As someone whose grandfathers served in WWII, I can also understand how the family members of an active or veteran service member would like to have a model of an aircraft their loved ones flew into the wild blue yonder. All I would charge is the cost of purchasing and shipping for the models themselves. No charge for labor. Even though I would not be making any money off of this endeavor, I think it would be extremely fun and would show my appreciation for those in the armed forces.
Here's how something like this would work:
A prospective client would contact me regarding a model they want built. I would give them a list to choose from, as there are quite a few options to size and manufacturer. From there, they would pay for the model and shipping costs. Once I receive the model, I would complete it and return the model to the client without charge for labor. Sounds like a nice idea to me, just throwing it out there.