Dragon factory is a bargain at $82 and I'm gonna buy it soon. I realize that a lot of folks here (including myself, at this point) are hobbyists and most don't feel comfortable budgeting a whole lot of dough for it. Some do. I don't mind because I plan on going pro some day. What you described above is an very comprehensive, detailed and labor-intensive line of products and one that you should be paid for fairly. If your product lives up to the ideal you've set forth, your suggested price range is very reasonable. Like the others, I'd suggest a resolution scale, perhaps with an upgrade option: buy the structure models and lo-res textures without so many props or other items at one price, with the option to upgrade to hi-res and all items. Kind of like DAZ handle the Vicki and Mike upgrades. With regard to what to build: keep it universal and really customizable. You don't want to sell something that everybody is going to get burned out on right away. The castle is a great idea and I'd probably buy it myself. Also, when building, keep in mind that you could change the whole character of the place with a later release of "texture packs." What you build as a castle keep and dungeon now could be a Renaissance manor next year with a fresh coat of "paint". Best of luck to you.