Have to say this is a wicked resource, opened up a whole new aspect of the game to me, developed a mule into an Alt just for this. And its profitable!! Well worth donating a few bucks on Patreon to support the author
Xbox One | EU | EP
Beardimus : VR16 Dunmer MagSorc [RIP MagDW 2015-2018]
Emperor of Sotha Sil 02-2018 & Sheogorath 05-2019
1st Emperor of Ravenwatch
Alts - - for the Lolz
Archimus : Bosmer Thief / Archer / Werewolf
Orcimus : Fat drunk Orc battlefield 1st aider
Scalimus - Argonian Sorc Healer / Pet master
Fighting small scale with : The SAXON Guild
Fighting with [PvP] : The Undaunted Wolves
Trading Guilds : TradersOfNirn | FourSquareTraders
Xbox One | NA | EP
Bëardimus : L43 Dunmer Magsorc / BG
Heals-With-Pets : VR16 Argonian Sorc PvP / BG Healer
Nordimus : VR16 Stamsorc
Beardimus le 13iem : L30 Dunmer Magsorc Icereach
Also you suggest "Launder only 1 Gold valued goods like provisioning ingredients for maximum Legerdemain exp with the least cost". However, it results in a net gold loss for players without ESO+ on crafting items (for example style materials).
It is more cost-effective to launder white justice items and immediately sell them to an NPC merchant that is present in a hideout for the same 40 gold that you paid to launder the item.