Many small business owners leave significant money in low-yield checking accounts (earning 0.01% APY instead of 4%+), unaware of the opportunity cost. Offer a consulting service that audits business banking arrangements and sets up automatic cash sweep accounts or T-bill ladders, charging a flat fee or percentage of first-year yield improvement. The Reddit post illustrates a real $7,000/year loss on $180k — multiply this across thousands of SMBs and the addressable market is large.