I can make WordPress plugins from scratch as per your requirement. In plugin you will get backend settings, shortcodes, proper ui, features according to our discussion, well coding structure, documentation (If needed), my plugin can be submitted to wordpress.org also. please check below link : I have already developed some plugins related to hotel and tour bookings, online review management, Job & application submissions for company. You can check this plugins in my portfolio section. some of them screenshots i added below. please have a look. Thanks.