Depends on how much you expect to get into it. I'd get a break-open before I'd ever want to fiddle with feeding a shell at a time into an auto or pump action on the trap range. Uggg what a hassle! But maybe that's just me.
I got into clays just to improve my hunting success and for something to do in the off-season. And like you I didn't want to spend alot so I started out with a low-end IZH27 from European American Arms. Yes, it's a $380 o/u and nothing impressive about the trigger mechanism from a repairability standpoint but it can be done and I'm no gunsmith. Took it apart just to clean and grease it. The Russians they grab parts from a bin and hand tweak things a bit till everything works smoothly. They don't bother making things pretty under the hood.
But overall it's a fair looking piece. I'd recommend going the longer model at 28' for a smoother swing and better balance. I say, why buy anything but a 12 ga. Can always load down to 7/8 oz 3 drams and these Russians build shotguns like tanks that'll handle 1 3/4 oz bruiser loads at 1300fps, no worries.
I knew I could always upgrade and retire the IZH to a knock around hunting only gun. But my IZH has been working so well and fits me nicely so I still use it for everything. I've put over 5000 rounds through it in 2 yrs and haven't had a lick of trouble other than a stock chip because they didn't fit the tang by the safety with enough clearance. Yes those bruiser loads do require a good stock fit.
Got around to buying a replacement stock that set me back a whopping $40 and made sure the clearance was there. Wonder what a Browning stock woulda cost? I only have one operational complaint. I would rather it not cock on break-open. So it doesn't quite fall open like other more expensive mechanism designs. But there's nothing more pleasing than outshooting guy's with the Browning and Citori with a 50 straight after they've been ribbing ya about owning a Russian shotgun.