Good, I don’t know how the fence for 9T€ looks visually, but in forestry/enclosure construction, the professionals charge between 7€ and 10€ per running meter including labor. For 105m, of course, they are reluctant, but even if you set double the price, you get a 2m high fence for 2T€ that no deer can jump over and no hare or wild boar can get through. Also no Hungarian pointing dog.
You would have to beautify it visually afterwards, but I think you can find a solution for 7T€.
You can also do it yourself:
Fence, fully galvanized, costs less than 100€ per 50m at that height, so a total max of €200.-
Cut, fully impregnated wooden posts 30 pieces (one post every 4m) at €20 each (an absolute crazy price, normally you pay 12-15€ each depending on thickness, split oak beams can be had between 5€ and 10€) ... max €600.-
Posts/beams are set/rammed with an excavator, takes no more than 20 minutes, 1 full hour with excavator costs including driver less than 100€
Attach fence with clamps by yourself, tension with the excavator (in the worst case costs another 100€ for machine/driver) ... total max 200€ plus a few drinks for the helpers.
If 2-3 people pitch in, it will be completely finished in 2 hours and for under €1000.-
Of the remaining 8T€, you will then have to necessarily invite the neighbors to a barbecue and plant some aesthetics.
Best regards
Dirk Grafe