If you go down the Wordpress route, go for Oxygen Builder rather than page builders like Elementor or Divi. It's more of a theme builder than a page builder, and tends to have a lot less code bloat, so it performs better. Do you actually need funnel building software for your services proposition or just a landing page? Keep in mind, the most important thing here is that you have a great offer that matches the needs and wants of your traffic. Without a great offer it doesn't matter how slick your landing pages are.