Yes, I usually get those kind of people. They all want my planes, but when when I build someone one of my planes... the smallest thing that might be off ( Even when it was like that from the factory) they want YOU to fix it. Make sure he buys everything he wants for that plane to have. Let him inspect the hardware and show him everything. If something doesn't work, or even if something is bent or warped it's best to call him and ask permission if it is OK to fix it the way you want to fix it. MinnFlyer is right... but if the dude is [8D] (I don't know him) then it might be fun to do. JMHO $100 is right for what you are going to build for him. Now if it was a Scale bird with detail, I'd have to say $100 is not enough.

Just my 2 cents worth.

GLWB