To run a tight administration with Odoo 12, all you need is the Invoicing and Accounting apps. A fully licensed Odoo 12 Enterprise with, say 5 users, and those two apps will cost you ZERO EUR/year.
You can get that confirmed at Odoo.com/Pricing
Select e.g. 5 users and check the Invoicing and Accounting app.
And what would be the cost to run a web shop as an eCommerce Business with inventory management and a full administration?
Runnig a fully featured eCommerce business with those 5 users with Odoo 12 Enterprise license would cost less than 200 EUR per month (2.328 EUR per year ex VAT to be exact).
(All mentioned prices are valid only on the date of writing this article and are VAT EXcluded).
Can't I run my eCommerce website and business administration using Odoo 12 Community Edition, which is FREE ?
Bluntly said, that is not a good idea. Odoo's truly useful eCommerce features to run a decent web business are only available in its Enterprise license. We don't recommend working with the bare basics of Odoo CE for that purpose.
However there are a set of excellent alternative solutions such as Magento eCommerce, LightSpeed, Joomla with VirtueMart and the exquisite AcyMailing for precise email and SMS communication. We are keen to guide you to help decide what is your best path in terms of quality, cost, timing and sustainability.
Talk to us, call +32 472 820 696. We love to share thoughts and assist with tuning your needs.
At the very least, you will be well prepared to oversee the battle field when you proceed.