This mod alters the "VendorGold..." leveled lists that determine merchant base gold. It also alters the "PerkInvestor..." leveled lists. If you are using any other mod that alters these leveled lists then you will need to decide whether to load it before or after Trade & Barter. If Trade & Barter is loaded last, then it will overwrite any changes made by other mods to these leveled lists. If the leveled list changes from Trade & Barter get overwritten, then the merchant gold options & the "Inventory Changes when Invested" will likely not work.
To try a time bank, search online for one in your local area using TimeBanks.org. How time banks are managed varies according to the region, so it is important (and often mandatory) to attend an initial meeting that explains the general rules of your local chapter. Once you do this, you’re ready to start trading away. Your services and contacts are identified through the local time bank website.