How to handle ~1k inserts per second
My simple RAID 10 array running on old hardware with 300GB SAS disks can handle 200-300 inserts per second without any trouble; this is with SQL Server running on a VM, with a lot of other VMs running simultaneously.

With just a consumer grade SSD, you can expect 3,000 to 5,000 or more 4K I/Os per second.

What exactly is your question?