Pay Off Debt vs. Invest: Opportunity-Cost Decision Tree

Pay the debt or buy the index fund? The honest answer depends on rates, returns and a few other branches most people skip. This builds a decision tree from your actual debts and investment options, comparing each rate against expected return. You end up with a reasoned call, not a coin flip. Good for windfall holders weighing both.

I have a windfall of {WINDFALL_AMOUNT} and I need to decide whether to pay down debt or invest. My debts are: {DEBT_LIST} (name, balance, interest rate). My investable options are: {INVESTMENT_OPTIONS} (name, expected annual return, risk level). Using opportunity-cost logic, build a decision tree for me that branches on: (a) whether each debt's interest rate exceeds expected investment return, (b) whether the debt is tax-deductible, (c) my investment time horizon of {TIME_HORIZON_YEARS} years, and (d) my risk tolerance described as {RISK_TOLERANCE}. For each branch, state the financially optimal action and quantify the expected net benefit over {TIME_HORIZON_YEARS} years. Present the tree in a structured outline format.