Yes, provided it is updated regularly and plugins are kept to a minimum. Most hacks come from outdated plugins. That is exactly what maintenance monitors.
Yes. Recent versions (PHP 8) are fast and modern, and PHP remains at the heart of WordPress, Laravel and Symfony. It is a stable technology, widely hosted and easy to get maintained.
Yes: the code is clean, pages are fast and SEO tags are set page by page. As everywhere, content and structure make the biggest difference.
The core plugin is free. Some extensions (payment, shipping, subscriptions) are paid, and hosting must be planned for. We include everything in the quote.
Shopify charges a monthly subscription depending on the plan, plus any apps and transaction fees depending on the payment method. We help you choose the plan that fits your volume.
The software is open source and free. Plan for hosting, any paid modules and technical upkeep, which we include in the quote.