Hi Rebecca, you obviously love these little guys and there is no doubt about that. I think that you shouldn't worry about what it looks like to other people if you put a price on these kittens. The fact is, the sole purpose would be for their protection and nothing else. As others have mentioned in previous posts, people who are trying to round up kittens to sell to testing laboratories or to use as snake food will not pay 25.00 or even 20.00. But a person with a good heart and home who loves animals would pay this amount if they felt a connection with one of your kittens. It's also another way to ensure that they can 'afford' to raise a kitten and keep a cat. If they don't have 20.00 they probably don't have enough money to spay or neuter them and that sort of thing. In the end, it's a great way to weed out people who may not be the best people for you kittens. And, any funds you receive from the kittens could go to help the adult cats that you also love so much.
I'm not sure where you are posting the ad for them but is there a way to also post their pictures? It might help people who have good intentions to fall in love with them and be willing to pay the fee to have them.
As you said, if no one came for them because of this fee, they would have a good home with you. But it does seem like alot for you to take on, especially with all the work you're undertaking with the adult cats, not to mention your own family. Don't forget that if you can't find good homes, the Butler Humane Society takes litters of kittens for a total of 100.00 and they state on their website that they are a no kill shelter. I only mention that to you because it is one more avenue available to you. Here is the link to their website: Butler Humane Society
I will continue to pray that the most wonderful, loving families contact you to provide homes for your remaining sweeties.
p.s. I think you're doing a terrific job of screening potential families for the kittens!