i need a worrpess website shifted to a new theme, while retaining the look and feel of the old website pages

I need to shift my website [login to view URL] to a new theme (using Jupiter x theme based on elementor) i need to shift the website to this new theme. I will provide the backend to the old website and will give new website with wordpress and Jupiter installation too. Just need to use the new installation and Jupiter theme to create the look and feel and functionality of the present stirring minds website. So I need the look of old site using the elementor page builder and backend of jupiter x theme. While applying do let me know the least cost for the work and the fastest delivery possible. I want to give this to someone who quotes the lowest and promises to deliver in the least time from now on and can at the same time convince me that he can do this with a minimum quality.