Hire a 3D Rendering Expert

I have a already developed laravel project. But it have few issues and client changes. First we will fix those issue and then we will use this project as a base and will develop second project with some addition sections and fuction. You will be responsible for both project all issue and completion ..if client want any changes regarding usability, you will do that on that cost ..and testing is done by yourself considering this ..tell me cost .. i will think about it...and also considering this project is our ongoing business relationship there are more and more after this. all payment done after project completion and client review.. Attached is issue list and information for redesign for second will be provided in chat.