Hi,
Magnific Popup allows for any content, so providing all of your posts are retrievable we could easily pull them in loading a few at a time.
What is your website running on?
I have plenty of experience working with Magnific Popup on the javascript side but also lots of experience working with PHP so I should be more than up to the task.
I'd also like to work with you going forward if that suits you, to help with any other problems that may arise!
Anyway, thanks for your time, I hope to hear from you soon!
Dan