Cloudflare for SaaS with apex proxying without enterprise plan?

Hi, I've been excited about bringing our SaaS over to Cloudflare for a while, today I finally started digging in and I found this:

https://developers.cloudflare.com/cloudflare-for-platforms/cloudflare-for-saas/start/advanced-settings/apex-proxying/

Apex proxying is an enterprise only feature. This is a deal breaker because most customers want to point their entire root domain to us...

Right now we have a VM with https://caddyserver.com/ on a docker container managing SSL certs for custom domains via letsencrypt. It works great for that.

Is there a known workaround to using Cloudlfare CDN / DDoS protection / bot mitigation / etc, while still letting customers point apex domains to us? Without having to shell out $5k/month on enterprise, that is. Some kind of mix of using Caddy + Cloudflare perhaps?
Cloudflare Docs
Apex proxying allows your customers to use their apex domains (example.com) with your SaaS application.
Caddy Web Server
Caddy is a powerful, enterprise-ready, open source web server with automatic HTTPS written in Go
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