Replace the themes payment plugin with Woocommerce on Wordpress site -- 4

I use this Wordpress theme for listings - [login to view URL] with this Stripe payment gateway plugin - [login to view URL] I am looking for a freelancer to realize, that all the payment information is transferred from my website to the online accounting system Paytrac - [login to view URL], which, among other things that I need, also provides the automatic generation of invoices. The solution should be a customized old or new Plugin, or Code snippet - so that there is no need to modify many files for each theme update. In my opinion is possible in two ways - .................... Option 1) - I think the best and simplest - Using Woocommerce instead of the original theme Stripe payment gateway plugin - in that case Paytrac automatically connect to Woocommerce and generates invoices from all orders. I need recurring payments, so is also used this plugin - Subscriptions For WooCommerce. Or the task in short: Theme Stripe payment plugin = WooCommerce (+ Subscriptions For WooCommerce) In this case: ... 1. - Basic task - On site front-end - the user submit listing (ad) - [login to view URL] After filling out the ad form, opens the next page - payment page,where currently are working the theme Stripe plugin, which directs the payment to the Stripe gateway. But this way it is not ok for me, because it's not possible to generate invoices. Instead, we need this operation to happen through Woocommerce, as it will provide all the necessary invoicing and connection to the accounting system. ... 2. Note - When submitting listing, there are several variants of the total amount - see checkbox at the bottom of the submit page - 1) Simple Free listing € 0.00 2) Simple listing (€ [login to view URL]) 3) Yes‚ feature this listing on homepage. (€ [login to view URL]) 4) Yes‚ feature this listing on category page. (€ [login to view URL]) 5) - 7) - ... In different combinations, it is possible to choose Seven different total prices, which I have collected in the Woocommerce store as 7 different products. The following should be done - so that when a check is made in the relevant Checkbox combination, the user is redirected to the payment of the relevant Woocommerce product. But maybe there is a better solution here ???!!! ... 3. Note - It may already be working correctly, but I'll mention it so that nothing goes wrong - Subscription data in both systems (Theme and WooCommerce) must be synchronized and match, so that the publication time of each ordered listing coincides with the paid subscription. On Theme back-and are defined subscription prices and publication deadlines for all five post types. And is also the user's Subscriptions For WooCommerce subscription details - if the user unsubscribes here, then the listing must also disappear from the front-end of the site. .................... Option 2) - I think more complicated - Using Paytrac API integration (without Woocommerce) - here is documentation: [login to view URL] [login to view URL] This option 2 is probably not so good, because: - The existing theme and Tevolution Stripe plugin does not provide the input fields for collecting users data, required for the invoice, as on the Woocommerce checkout page (name, surname, company name, registration number, address) - so they must be created in addition; - With the existing theme and plugin, I couldn't get recurring payments to work, even though the feature is intended. I think maybe it can be fixed. - And there is no option for users to unsubscribe from recurring subscription at any time, as is possible in the Woocommerce user profile, using plugin Subscriptions For WooCommerce. ... Anyway, if you have a better solution for this functionality - I will be happy to hear your idea. ... Skills and Experience: - Experience with WordPress and WooCommerce - Knowledge of payment plugins and customization - Ability to understand and implement specific requirements for the payment process