Inquiry About Frappe Cloud ₹2050/Month Plan

I’m planning to subscribe to the ₹2050/month Frappe Cloud plan for the first time and have some doubts regarding SSH access.What exactly does SSH access mean? If SSH access is not available, what other restrictions come with it?

Additionally, is it possible to install ERPNext and the HRMS module under this plan? Can we customize the system using client and server scripts?

For a small company with around 80 staff members, would the ₹2050/month plan be sufficient for customizing ERPNext? Could you provide more details about this plan?