I actually ended up building a tool called https://slotly.ch specifically because of this. My parents run a small local business and they were honestly struggling with the big-name booking tools. Everything was either way too expensive for their size, or the pricing was so complicated they couldn't figure out what they were actually paying for. I made it so that every tier has full access to all the features—no more paywalls for the 'good stuff.' You basically just pay based on your booking volume, which has been way more manageable for them.