If you love the game, support the developers. Buy the base game on sale. Buy one Lord pack that excites you (e.g., Champions of Chaos ) and master it. As you save money, buy the next DLC on the following sale.
Because they are heavily compressed, they can take hours to unpack depending on your CPU. How DLC Unlockers Work with Repacks dlc unlocker total war warhammer 3 repack