There's nothing special about .dev domains, other than they're automatically included on Chrome's HSTS preload list (so Chrome won't let you connect to a .dev website unless it has a valid HTTPS cert). If Bluehost says they "don't support" them, they probably don't know what they're doing.

This is what you'd typically do to point a custom domain (eg example.dev) that you've registered through one DNS-hosting company to a website that you've set up with a different web-hosting company:

https://docs.netlify.com/domains-https/custom-domains/config...