So, fun trick with sets like these, that are in the more 'professional' space of Lego is that most of the time, these sets are very open ended because they only provide you a bunch of common pieces. Which you can buy yourself.

Bricklink has a wonderful feature that you can take a set and then part it out into a wanted list, and then search seller inventory to find those parts. That's how I built that giant Imperial Star Destroyer set from the aughts for a little over $200 instead of the like $1000 that used copies of the set were going for at that time (it's probably even more now.)

Just for funsies, I looked it up, and you can get the whole 21050 set for about $150 now on bricklink, which is a pretty good $/psc price. Considering what the set is, and the lack of stickers, means it should be easy to wash a used set to get all the pieces nice and clean; a laundry bra bag with a fine mesh works great for this.