Modify WordPress theme and plugin (budget = 4000 approx)

I purchased these theme and plugins with unlimited site license but they don’t fit how I use them. So I want to modify as per my specific requirements. There are 1 theme and 3 plugins, all connect with a core plugin. Here is how the normal activation process works: 1. I install core plugin and activate license key (image1). 2. If the key is valid, the page will reload and display all products (themes and plugins) and purchase status associated to my account. 3. If the product was not purchased, it shows “Purchase” button (image2). If the product was already purchased, it shows “Connect” button (image3). 4. Once I click Connect (to link product to the domain and make it work), the page will reload again and display “Install” button on that product (image4) which I can install and activate like normal theme / plugin (image5). What I need you to do: 1. I will provide you a fake license key. You have to make this key able to activate core plugin and can use all products just by installing and connecting them. But without this key, all products can’t work. 2. I don’t want the license key to show after activate core plugin. Please display asterisks (*******) instead of the key (image6). Normally, the license key shows all the time after activation. 3. Another major problem is that plugin and theme call back home every time they’re used (to check the license or whatever reason), so I want them to work 100% without connecting to developer’s server. 4. I need you to guide me how to null too, so I can do it when the products update. Just tell me what files and what codes to edit. I don’t know if you have to null only core plugin or null all theme/plugin but I will send them all to you. It might sound complicated. But I think it should be easy if you are familiar with coding Wordpress theme and plugin. I tried to explain in details as much as possible. Please contact me if you have any questions.