Source: Odoo admin and consultant I’d 100% go with a VPS. You can check out cloudpepper for a nice hosting platform, it’s a management layer over your own VPS that just simplifies a lot of things ( addon management, installation, etc) If you ever plan to grow even the slightest, you’ll find Odoo online restrictive as no third-party modules can be installed. No custom Python code either. If you are serious about ERP, talk to a local partner. Try to find one that has experience with your activity sector and don’t get fooled by the partner level (learning, ready, silver, gold). These are based on # of entreprise licences sold by that partner (and also # of certified employees, but that’s secondary). A smaller partner with retail experience will be better for you.

Feel free to DM me questions you have, I’m happy to share my experience!