JohnB Jordan I stand by my statement. Don't have critical infrastructure of your business in your home. Homelab is not professional.
I understand the concern about having business-critical infrastructure at home. Security and reliability are essential. However, I think you're stuck on the word home lab. Should I call it a data center? What's the difference?
At what point is it not a home lab? Does it need to be in a separate building? Everything I've listed above is what telecommunications providers use for their POP's/CO's just down the street from my home. Perhaps throw in a generator ATS? A secondary fiber connection? You'd be surprised what huge corporations consider "professional".
The next "homelab" build will actually be a physical building, with a battery bank, solar, both diesel and natural gas generator, climate control, water cooling and more!
If you're dealing with sensitive customer data, you should encrypt the backup data no matter where it resides. If you simply need a place to store backups, look a solution that fits your requirements. Consider the RTO/RPO, understand the risks, and choose the best solution for your needs and budget.
The pace things are going with internet connection speed, disk storage and selfhosting software. Anyone can setup a mini-dc with better uptime than Hetzner 😉