Looking for Budget-Friendly DJI Whoop Setup Advice

You're intrinsically going to pay more for a digital FPV system than an analog one. If you're trying to save money, analog is your best bet. Alternatively, you may find a decent deal through eBay or any local social media drone-focused groups.

I agree with @BlaqkstarFPV. Alternatively, it might be worth checking out the BetaFPV P1 or Caddx Ascent video systems, as they are a lot cheaper and might suit your needs (of course there are compromises). Other than that you're looking at spending a bit more than $500 for drone and goggles (DJI Goggles N3 + BetaFPV Meteor or Pavo series) new.