For kids to see, albinos, lucys and pieds. Those are strikingly different from a normal.

I would think about something newer, rather than a established morph that's common.

Also, if you don't have tons of time, entering into a large scale breeding project/collection is not a good idea. It will take a ton more time to care for. If you get overwhelmed by the work of it, you won't be enjoying it.

Lastly and most importantly, I would definitely get whatever money agreement you work out in writing, notorized and signed by all parties. I know you think "Oh he's my friend" but if you don't have paperwork and everything set in stone beforehand, there could be misunderstandings later and then you lose a friendship in the process. Talk about all the details, what is paid for, what is owned by who.