There's a ceiling. Here's where it is.
The two DIY paths in this bonus module are powerful. For most custom sections a vendor would want (a market schedule, a process accordion, a size guide, a gift message field) they work and produce real, installable results without any coding knowledge. I wouldn't have spent 3 lessons teaching them otherwise.
There's still a ceiling. Knowing where it is will save you time and frustration, and help you decide whether to keep going DIY or hand the work off.