PCE Brownfield migration procedure.

I already looked into the papers 'Partner Led Migrations - ECS supported Migration approaches' 

So I bash recognize that migration server volition beryllium provided for upload the migration data. 

But one person 3 question for this migration server. 

1. Is this migration server escaped of complaint oregon hap other charge?

2. Is this migration server provided with definite mentation of OS? Or is it conscionable bare server truthful spouse should physique from installing the OS?

3. is it imaginable that we conscionable upload the HANA DB Data backup for strategy transcript alternatively of installing the full SAP strategy connected the migration server? Or is it indispensable tally SWPM connected migration server with the backup from archetypal server? 

Regards, 

Yongjun Yoon