Setting up the desk

We have to legal entities say A (proprietorship)and B (Pvt Ltd)
A have three websites
i. Main of A Website
Ii. E-comm Website
Iii. Service Website

B is a Distribution and a retail website

We have to implement following modules for both entities from a single ERPNext site/desk (from only one login)

Financial Accounting
CRM
Inventory
Sales
Purchasing
Projects
Manufacturing
E-Commerce
Website
Support

I have to setup all the above things on a single erpnext site/ login/desk

cc: @Shubham_Gupta

Post Job at https://erpnext.org/erpnext-jobs

Dear Sir,

Thanks for advise. Actually, we want to post job also but unable to do so due to some issue and already opened topic about it Unable to add a job on ERPNext.org

Meanwhile, Nishank here (who is interning with us on Frappe/ERPNext) is trying to understand if the above scenario is possible to do where one single desk/login can be there and effectively work with multiple websites/domains. Any suggestions or ideas in that regards from the community will be really helpful. Thanks in advance!