ETF's are index funds. Passively managed mutual funds. VOO, SPY, AGG, BND, etc.But ETFs have risks that normal Index Fund investing (or MFs) do not carry.
Fee-based means that they are still motivated by commissions. The Boglehead buy and hold philosophy is something that a fee-based adviser is going to be against because there's no commissions and no ongoing fees to charge. I would want a fee-only adviser if I was a senior in need of advice.Many people who have responded to your posts are CFPs which means they are fee based financial planners... one of the highest, toughest, & comprehensive financial designations an advisor can have.