Nice, that’s a fair approach! I was curious and wanted to see what it would look like to use config like the docs suggest.

TLDR: create a custom currency since the display seems to be different than the other BOL options (money/lib/money/currency.ex at master · elixirmoney/money · GitHub).

If you are past the TLDR, after creating a new mix project, this diff does the job:

commit 2c545bd7df55b4eff0ae889937a5640647736bd2
Author: Paulo Daniel Gonzalez <pdgonzalez872@email.com>
Date:   Sun Jan 7 13:31:48 2024 -0600

    Solve https://forum.elixirforum.net/t/how-can-i-customize-the-symbol-for-a-currency-in-the-money-package/60825

diff --git a/config/config.exs b/config/config.exs
new file mode 100644
index 0000000..5df6358
--- /dev/null
+++ b/config/config.exs
@@ -0,0 +1,19 @@
+import Config
+
+config :money,
+  default_currency: :BOV2,
+  separator: ",",
+  delimiter: ".",
+  symbol: true,
+  symbol_on_right: false,
+  symbol_space: true,
+  fractional_unit: true,
+  strip_insignificant_zeros: false,
+  code: false,
+  minus_sign_first: true,
+  strip_insignificant_fractional_unit: false,
+  custom_currencies: [
+    BOV2: %{name: "BolivianoBs", symbol: "Bs.", exponent: 2}
+  ]
+
+import_config "#{config_env()}.exs"
diff --git a/config/dev.exs b/config/dev.exs
new file mode 100644
index 0000000..e69de29
diff --git a/config/test.exs b/config/test.exs
new file mode 100644
index 0000000..e69de29
diff --git a/mix.exs b/mix.exs
index 79efc4f..cffe122 100644
--- a/mix.exs
+++ b/mix.exs
@@ -21,6 +21,7 @@ defmodule MoneyForum.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
+      {:money, "~> 1.12"}
       # {:dep_from_hexpm, "~> 0.3.0"},
       # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
     ]
diff --git a/mix.lock b/mix.lock
new file mode 100644
index 0000000..a043fc3
--- /dev/null
+++ b/mix.lock
@@ -0,0 +1,3 @@
+%{
+  "money": {:hex, :money, "1.12.4", "9d9817aa79d1317871f6b006721c264bf1910fb28ba2af50746514f0d7e8ddbe", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}, {:ecto, "~> 1.0 or ~> 2.0 or ~> 3.0", [hex: :ecto, repo: "hexpm", optional: true]}, {:phoenix_html, "~> 2.0 or ~> 3.0 or ~> 4.0", [hex: :phoenix_html, repo: "hexpm", optional: true]}], "hexpm", "87e4bb907df1da184cb4640569d8df99ee6d88c84ce4f5da03cb2fab8d433eb9"},
+}
diff --git a/test/money_forum_test.exs b/test/money_forum_test.exs
index 5ab245a..e9d417b 100644
--- a/test/money_forum_test.exs
+++ b/test/money_forum_test.exs
@@ -3,6 +3,8 @@ defmodule MoneyForumTest do
   doctest MoneyForum
 
   test "greets the world" do
-    assert MoneyForum.hello() == :world
+    assert %Money{amount: 123_450, currency: :BOV2} = bol2 = Money.new(1_234_50, :BOV2)
+    assert "Bs." = Money.Currency.symbol(bol2)
+    assert "Bs. 1,234.50" = Money.to_string(bol2)
   end
 end

That‘s why I generally suggest ex_money over money. It comes not just with a type, but e.g. also knowledge about how formatting should work in different places of the world.