I just got to read this, and it is very interesting.

As for making a unofficial run, I think this is not a very good idea. To explain as best as I can....

Yes, you bought couple of solids with your own money, but think of what the word "RUN" means. It means that the figure you have made a custom run of to sell still has the figures companies name on it. To people who does not know that is "Unofficial" may think that it was a collaberative run. People in Japan may see it as," This company does collabs with fans. Maybe I should hit him up, and if he says no, then I'll bring this topic up". As you can see, it is very annoying if you are a creator for such figure and start getting millions of calls and being yelled at or debating about something you never heard of.
With Mori, this has come up many time when I have talked to him. Doing a "commission work" is fine. The customer knows you as a artist and wants a one of a kind for their collection. Posting a custom you did and one person is interested is fine. They like it, they want it, they buy it. But startting a "Unofficial Run" is just disrespectful to the maker of the figure. Not talking to them about doing it and just going ahead and selling a run is just not a good idea.
Another way of thinking is, RxH is popular right now. Everybody is buying SOLIDS and customizing for fun. Make a run thats awesome and sure you'll make cash. But would it be the same if it wasn't popular??? To me, it just seems that if something is hot, it's a window for making cash. Do you think the makers would like to know that also? I don't think they would.
SOLIDS were made so the customizers here can have fun and make their own one of a kind. Experience what the makers in Japan has to do. I've also talked to some of the guys in Japan, and many have told me that there is not alot of interest in custom painting a figure. Still more people prefer model kits like Gundam and so on.
Sorry to make this long. But I thought I should let you guys know what I feel and what I have heard before. Go and buy SOLIDS to paint, do commission work and so on. But don't buy it just to make a run and selling it to make some big cash.