The pages that you built using any paid plan (including Pro templates & Pro blocks) will stay on your website forever, even after you cancel your paid plan.
You simply will not get Pro support and access to Pro templates & Pro blocks anymore.
We accept PayPal and major credit cards via PayPal.
Yes. We have video tutorials for every page elements. You can find each of them inside the Page Builder Dashboard. Or, you can watch them on YouTube: https://www.youtube.com/watch?v=lK0rwSNBSQA&list=PLJQC5OksVIrw2Clx0SQUAzdW-n4YRId9G
You can find out more about the differences in this comparison table.