You don't have to go straight to the Professional ($108/year, unlimited searches) plan. There's also the Trial (free, 100 searches one-time) and Starter ($5/month, 3600 searches per year) plans, to help you figure out if it's worth spending for the unlimited plan.

Once I hit 3600 searches & was faced with the prospect of either going back to DuckDuckGo & Google to provide inferior search results -OR- paying $108/year for Kagi, it made the choice pretty simple. But it took me a few months to get to that point, and I don't think I spent more than $15 in that time figuring out if Kagi was right for me.