As I was having the same problem with the same mods.
Install into Steam\steamapps\common\skyrim\. You may have to wait for merchants to restock (Takes 2 days). Changes most merchants to have 2,000 gold instead of 750. I feel like I am alone in this because I can't find anything about it. The chances are that you're using the 'Rich Skyrim Merchants' mod or otherwise. Without bugs or mods, the richest merchant of the game is Tonilla, but only after the Thieves Guild get influence in all the 5 major city holds (Riften, Whiterun, Markath, Solitude and Windhelm) She will get, every 2 days, 5000 to 4000 septims. Changes most merchants to have 10,000 gold instead of 750. I started a character using mods, Everything seems to be in a proper order, but I keep coming across NPCs (Specifically Bandits that turn invisible or into invisible werewolves!!) Even in early game! I'm level 3, at Bleak Falls Barrow and one of the Bandits turns into an Invisible Werewolf!!!! I find this extremely game breaking!! Anyone know the possible issue?!