Amazon products slow down my WP significantly

I have more than 3,200 Amazon products on my WP site. These are hand-picked individual products that resided on the sidebar as a dropdown collapsible category function.

My site is: [ link redacted, please do not post links in reviews ]

I had serious speed issues that kept me from using a couple of those traffic-getting folks on Fiverr.com. They both explained that it took too long for my site to load and they returned my cash.

It was true because I’d noticed it.

My programmer fixed the problem after a thorough look and he removed the plugin that allows the hierarchy of collapsing categories. The speed was immediately faster and I was happy until he told me that there isn’t another collapsible plugin that wouldn’t make my site slow again. So he fixed it the best he could which is what’s on there now.

To be honest — I’m not thrilled about his fix but he explained that the bottom line is that I have too many products and too many categories. Which is definitely slooowing the entire site down.

I had Geek Squad take a look but that’s not their area of expertise. Then I had HostGator look at it and they said this isn’t a server problem — that my site needed a programmer to take a look.

The programmer is pretty well-versed in what makes WordPress tick.

I’m here to find out if there’s a plugin he doesn’t know about that can get me back to the collapsing hierarchy that makes sense and doesn’t slow everything down.

Thank you for your time.