In reply to Enty:
Picked up a used E5 Specialized Diverge, with the aluminium (budget end) frameset, and am very impressed with the way the frame rides and handles. It comes equipped with Shimano Claris (8spd) and Tektro cable actuated brakes so clearly at the bottom end equipment wise. The gearing was hopelessly inadequate for "proper" offroad riding so I swapped out the following:
Chainset and BB for a Shimano MT6000 double (26/36 10 spd)
Shimano 10spd chain.
Shimano 10spd MTB front derailleur (Deore low mount model)
Shimano HG50 11-34 8spd cassette (original cassette was budget rubbish)
Initially I was unsure if the eight and ten systems would "mesh" but was chuffed to find it works well.
Then swapped the wheels out for Fulcrum Rapid Red 5's and run WTB Raddler 44mm tubeless at 35psi (running anything much less than 45mm tyres and you are wincing and mincing on rocky stuff!).
Sorry for the long winded detail but it maybe illustrates that you probably will have to swap out a bit of kit, as people have already expressed above, to get a capable bike at that budget. This came in at well under a thousand...... although I'm still left with cable discs but they're manageable just now
I ride several bikes (road and mountain biking background) including a Planet X SLX crosser (carbon), Planet X "Fatty" fatbike and too many vintage steel road machines from custom built sharp handling terrors to 27x11/4" equipped touring machines so do have a good base for objective comparison.
Gravel is definitely the way to go! Far more relaxing than running the gauntlet of the SUV driver paying more attention to the phone than the road