Sales Funnel CEOs will hate me for this

There are many sales funnel saas products out there but they are expensive and get even more expensive the bigger your email list is.
I think it's a big hinderance if you are just starting off or want to test out your product idea with minimal expenses. I’ve successfully build a sales funnel website without paying monthly SaaS fees and I would like to share it with you. https://medium.com/@rutkat/how-to-make-a-sales-funnel-without-monthly-fees-64a532e97640
Do you currently use sales funnel software? What do you like and dislike about it?