This gist is to accompany my comment on Mark's article:
[Build modular content systems in WordPress] (http://www.creativebloq.com/web-design/build-modular-content-systems-wordpress-41514680) by Mark Llobrera
Which if you haven't read (or just stumbled upon this gist by chance) then I highly recomend you do.
It demonstrates some key concepts on how you can use ACF to build your clients mini page builders. By doing so you can avoid all the bloat that the big page builder type plugins use. You will also build up your own mini library of elements that you can reuse depending on the project.