Little to no practical experience. She's fired a variety of firearms before, but never hunted or used them regularly. I think an O/U would be my preference too. Maybe the CZ Redhead Deluxe? (Sorry to hijack the thread, but I thought it might be relevant to the discussion).
Breechloading shotguns are comparatively way easier/simpler to operate, handle (due to usually slimmer profile), prove safe and perform maintainance chores involving take-down, re-assembly etc. One may agree that those are kinda common attributes that members of the fair ### generally look for while considering most things in life (no pun intended).
Around the $1k price range - a 20ga CZ SxS or O/U field models may offer much satisfaction. One could also use such for informal/occasional clay shoots. The firearms, however, weren't designed for high volume shooting.
You may wish to check out the 20ga Redhead (O/U) as well the Ringneck (SxS), those are both equipped with SST (single selective trigger).
Alternately, you may also wish to look at the 20ga Bobwhite with DT (double triggers).....my personal preference, as the lower priced DT guns will be less prone to mechanical troubles. Having said that, there are plenty of CZ shotguns with SST in current use that haven't had any trouble at all.
Look for CZ guns made after 2006 (the first two digits of the serial indicate the year of production in the CZ models).
Personally, I haven't had an opportunity to use Yildiz shotguns yet. However, the reviews have been mostly positive from what I have read so far.
As far as used guns are concerned, it would be great if you come across something such as a 20ga SKB 100 (SxS) or SKB 500 (O/U) in VG to Exc condition. Or something like a 20ga Savage Milano O/U (now discontinued).
With around $1.5k and more - Brownings and Beretta (my preference) can also enter the equation.
Again, gun fit will matter the most regardless of brand/type. 26in bbls may be a better option in view of the end user. Best of luck in your quest.