We need a developer who has extensive experience in working with custom WHMCS setups. We need someone with a deep understanding of the platform who can advise on best practices and how best to handle things. ------------------- job details ------------------- We have a WHMCS account setup for our portal. But we need our old customers to be migrated from our existing custom built PHP dashboard to the new portal including their paypal subscriptions. The old customers need to be grandfathered in and we do not want to have them re-subscribe We also need a couple of custom forms coded in for users to be able to login and enter their data/instructions that should be displayed to the admin as a ticket. And also, the admin should be able to add in certain data for each customer that should be available for display to each customer when they login to their account. Inside the dashboard, we need forms that allow customers to change their account information, including submitting new monthly information for our services. Customers should be able to easily upgrade their plan and use discount coupons. Please provide rough estimate for this job.