From what you've shown of the interior, it is just as beautiful as I had imagined it would be.
Everything is nicely symmetrical in the bedroom, right down to matching busts on the tables beside the bed! Is that one of those rare, white Playmobil "Color" hats on the male bust or did you paint a black one?
I've had difficulty too when taking photos of pale-coloured or shiny things with a flash. The light tends to bounce off all the surfaces.
I know you haven't got much room at the back of your chateau, but if you can get some free standing lamps with high wattage bulbs and direct them into the rooms you're trying to photograph, you may be able to take pics without a flash. Other than that, just keep doing what you are doing because I am really keen to see some more of the rooms you mentioned in your "teaser"!
Thanks for giving us a glimpse of the inside, Michael, and please don't worry about picture quality. These ones look just fine!