hello,
i'm offering you reverse by telling you why you've to stay stick with wordpress backed system:
1. Easy to manage
2. Continuous updates
3. Security (needs extra investment, but the amount is not big!)
4. Easy Feature enhancement
5. Any wordpress professional can provide you the support for enhancement, management, modifications and so on
6. Responsive, meaning you don't need to build an expensive mobile app for your website
7. And much more advantageous.
Of course, every system has limitations and wordpress backed system has also no difference. but if you've good developers and investment (again a question of money), you can create a good website. one time investment is ideal for all kinds of (all platforms) IT projects. you can see windows has periodical updates, google has periodical updates, apple has periodical updates, android has periodical updates! have you ever think, why is so many updates?
because no system is error-free and error may occur at any time! what you have to do is keep your eyes open for your system, take necessary action for inconsistencies, protect the website from attack and keep it up to date (it means you need regular support from a developer or hire a permanent professional for your website).
if you think i'm telling you the truth, knock me for further discussion. i can give you complete solution using wordpress and woocommerce and based on your requirements, it may cost you 900 - 1200 usd for completing the site without content.