Generally it would take Fawngate almost a whole day to deal with emptying her TR cache.TR cache. Let's face it, over each character's life, we accumulate items and what not that are useful to us (and for many of us, we also take the time to accumulate loot that will benefit our next planned life [or lives]). Problem is, we simply don't have enough inventory/bank space to store all the junk we accumulate (and while it is true that you can probably destroy a good amount of it, eventually, it's going to get to a point where all "junk" you have in your TR cache is valuable, hard-to-obtain loot that you don't want to throw away).
My suggestion: Either make it so you don't have to clear out your TR cache before you TR, OR offer us Supreme Enchanted Bags of Holding (SEBoH) that work like Colossal bags that are capable of holding THOUSANDS of unique items (complete with a search function as with the other bags, and also adding an advanced search/organization feature to quickly and more easily find desired items). Should you go along with the route of adding supreme enchanted bags, there are two critical functions that need to be added to make this work.
a) GM-Flagging: Basically, whenever you put in (or remove) an item from this bag, it leaves a flag or tracer for a GM/Turbine Account staff. The purpose of this is to prevent situations wherein if the player, for whatever reason, winds up LOSING their Supreme Enchanted Bags of Holding (usually by glitch) via TR'ing or whatever (and by extension, EVERYTHING they put into the now lost bag), it would enable a GM/Turbine Account staff to quickly find and retreive those items. This feature would also work in such a way that items stored within other bags that THEN wind up into the SEBoH would also be recorded so no one has to worry about losing collectables (such as Flawless Red Dragon scales), or Ingredients (such as that once-in-a-millenium-super-ultra-hyper-rare Shard of the Ring of Spell Storing) in the event that the bag gets lost.
b) Multi-selector: Another annoying feature of TR caches is that you must Meticulously, and painstakingly empty your cache ONE. ITEM. AT. A. TIME. These SEBoH's should offer the ability to select multiple items (or even the ability to take ALL of them out at once, if one should so desire), and with a single click, receive those items.
I agree if you plan on creating all this new TRing, you seriously need to address our issues on inventory.