Classified Theme Customization (Adifier)

This is just a theme customisation and not an entire site development. The budget on this is $75 to $100 only. 1). Seamless Integration of Subscription Price Table with promocode option + Registration + Email Verification + OTP (Twilio-already integrated, just need to bring it to the registration page) + Trulio + Payment via Stripe or Paypal (Already integrated) Right now everything is integrated but happens in different stages/places on the website and I want it to be all in one page via AJAX or step by step(All in One Page) instead of having the user go back and forth. 2). Show Quantity Field from the custom fields on Grid Listing Title or Listing on frontend listing page 3). Other minor help with Css or JS. Codes must be clean understandable, the CSS should match existing format and the forms should not be looking out of place. 72 Hours Delivery.