Is there a way to permanently create 44064 gallons of acid for less than 100k gp?

Summary:

I’m looking to permanently create $$44064 text{ gal}$$ of acid on a budget of $$100,000 text{ gp}$$. As part of this, I am building a level 12 character who will be the one creating and using the acid.

Restrictions:

• Level 12 character.
• Only Paizo material written for Pathfinder 1e is allowed (no 3.5 content is allowed).
• The following books are not legal: Niobe, The World of Vampire Hunter D, Worldscape
• False Focus and Blood Money are banned.
• Any spell that cannot be cast by a level 12 spellcaster is banned.
• Exception: If 12 levels in a class grant early access to a spell, then it’s allowed.
• Exception: If a deific boon or similar thing allows you to cast that spell as a spell-like ability early.
• Magic items that replicate these banned spells are not allowed (though they may have the spell as a construction requirement as long as they don’t create its effect). Scrolls, wands, potions, etc. are capped at a caster level of 12.
• Spellcasting Services are allowed but cannot be used for those banned spells. Additionally, they can only be used for spells that are on a class’s base spell list. Casters that use early access methods (bloodlines, curses, domains, patrons, etc.) are not allowed to provide those early access spells.
• Ex. A witch with the Thorns patron could not be hired to cast wall of thorns, they would only be able to cast spells on the witch’s base spell list.
• Crafting is banned. You can purchase any item for full price.
• Custom magic items are not allowed.
• In order to be a viable method, there must be an explicit or implicit amount of acid created that is listed in the item’s or spell’s description. Interactions with the environment are allowed
• Example 1: Dust of Acid Consumption states that it holds up to 10 gallons of acid. Despite not actually providing the acid itself, one that had already soaked up acid would be a valid item for purchase and thus it is able to be used for acid production.
• Example 2: Acid states "flask of acid". Since flask is an item and states "This glass bottle holds 1 pint", we have a numeric quantity that it provides. (It’s just too far out of budget to use for the required quantity though.)
• Example 3: Acid Arrow does not state how much acid is created, nor provide any reference for it. Therefore the spell is an invalid method of acid production.
• You may not roll any dice during character creation. If an activity allows taking 10 you may do so, otherwise you are assumed to always get the worst possible result (usually a natural 1). In scenarios where the worst possible result either does not exist or is subjective (such as the reincarnate spell), you simply cannot take that action.
• Note: By permanently create, I mean that a magical method of acid creation must have a duration of instantaneous or permanent. Effectively permanent methods (whether by recasting the same spell due to the duration being long enough or another way) are not valid.
• Exception: The only exception to a temporary method is if the acid is then stored in such a manner that the duration is able to be permanently suspended (such as by using a Neverspill Goblet to store it). Any methods of suspending such a duration are to be added in to the cost of acid production (that is, the cost of producing the temporary acid plus permanently storing it needs to be under $$100,000 text{ gp}$$).