I agree, she really does have some gorgeous birds!
A lot of satins started with a cochin x silkie cross but they aren't really considered satins until they are bred back to the silkie standard by back crossing to silkies for multiple generations. They are considered by a lot of enthusiasts as a project breed that is bred to the same standard as silkies other than feather type. Cochins are a good choice if starting your own satin line because their overall type is already similar to a silkie. You can use other breeds too but you may have more work getting back to the correct type. Polish type is very different but they do have the advantage of that nice crest. The mille fleur satins were actually started using I believe tolbunt polish, mille fleur cochins, and mille fleur d'uccles and crossing with satins and silkies.
Getting already established satins from a good line is definitely the easiest and cheapest (in the long run) way of getting satins. Having some fun cochin/silkie mixes would definitely be neat too though and while maybe not technically satins yet they'd be adorable! Of course if the journey to get from the initial cross to satins really appeals to you the cost and effort of starting your own line just might be worth it!
I'm afraid I don't have any good advice on how to help your little cochin boy chill out. I have way too many boys to know what to do with and they drive me nuts!

I hope you are able to find a good solution though, I'm sure your silkies and him would make some adorable babies!
Of course you are very welcome!
New color development projects sure are fascinating and so neat to follow along with! Lauren definitely knows her stuff when it comes to mille fleur satins. I'm really enjoying learning from her posts in the mille fleur silkies and satin group on Facebook (I usually just lurk, but soak up everything I can).