Dynamically exchange techtree content PRoblem

[littleeast2025]

Hello, I'm trying to implement a reroll system, similar to TFT from Riot or the map Heroic Origins Galaxy TD.
I encountered the problem that Techtree entries (Techtree - Upgrades to / Techtree - Units Trained) cannot be dynamically shown and hidden.
The basic logic should be relatively simple: In a basic tower, the user can click on a button which then displays 4 tower upgrades from a pool of, for example, 50. If the user clicks again it would logically be a different 4. The problem for me is that the upgrades cannot be exchanged at runtime.

This is theoretically possible with Abilites, but I don't have the native support for gold/wood costs. Yes, I could then work with triggers for the costs, but I would like to have the native gold/wood cost display in the tooltip, so I would welcome it if it could be done with units/upgraded.
Does anyone have any tips or know if I'm missing something? Thank you very much!

 

[Pyrogasm]

but I don't have the native support for gold/wood costs

Charge Gold & Lumber can have these costs. Its order string can be changed as well so that it doesn't conflict if you have multiple instances of this ability (with different orders) on the same unit.