Developing a research tool on Wordpress. Wise Plugin selection+ advanced PHP coding needed (expert level)

Hello, I have an online research tool at ([login to view URL]). You create a survey, distribute the hyperlink for survey, respondents take survey, website records their responses and exports the data (like [login to view URL]) I want the recreate the website + new developments be done on Wordpress, allowing me to control it in the future by myself. So you will essentially need to check the website and read the new developments and see if you can make use of existent plugins on the web, and have additional coding to customize exactly what is needed. I will designated additional $500 for purchase of needed plugins. This is a fixed price project on $2000 budget + $500 plugin budget if needed. PLEASE login in to the page by using "demo" as user and "demo" as password and see how the Researcher Interface Looks like. If you take this survey you will see how the Respondent Interface looks like ([login to view URL]) These are the new features: 1) Cloud storage space resembling Google Drive 2) User profile resembling that of Facebook 3) Messenger resembling that of Freelancer. 4) Questionnaire consisting of 7-8 question type. Refer to Survey monkey. 5) I will design the homepage by myself 6) Collaboration on surveys: Sharing surveys between researchers time bound: Edit or view. 7) Distribution of surveys to a list of email addresses, sending follow up emails, sms reminders, etc to take survey. 8) Admin control dashboard which can control every registered user account, generate tickets of inquiries, create coupons, subscriptions, see analytics of usage, etc. 9) The whole survey creation interface needs to be architected again. Meaning to be done in a simpler and user friendly way. I need to share screen with you to walk you through. 10) the respondent interface needs to be architected again. It should look more fashionable, easier to use, etc. Thank you