BE5K to Virtual CUCM and Unity Connection 10.5(2)?

Hi,
I am migrating a CUCM and Unity Connection 8.6 from physical server to CUCM and Unity 10.5(2) and I estimate about 2-hour effort with PCD to migrate the CUCM to be ready for testing. Not sure about Unity Connection Part though. The physical server is serving 120 users with 3 remote locations(via MGCP) and complex integration with other systems. I only done greenfield deployment before...no migration/upgrade experience...
Simple/not simple questions:
1. Will the 2-hour be enough for CUCM?
2. PCD doesnot seem support migration of Unity Connection to 10.5. What is the recommended approach? Gradually move data or cutover?
3. From your experience, how long it takes for upgrading/migrating Unity Connection?
I have these 2 documents from Cisco as my reference, any other recommendations?
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/ucmapMigrate/10_5_1/CUCM_BK_M24251C0_00_migrate-procedure-for-cucm_1051/CUCM_BK_M24251C0_00_migrate-procedure-for-cucm_1051_chapter_01.html
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/10x/upgrade/guide/10xcucrugx/10xcucrug022.html

Thanks for pointing it out. I did not realize BE5K is not supported by PCD.
Will this be my next best bet then:
Install version 8.6.2 VM in ESXi
Export info using BAT from BE5K
Import info into 8.6.2 VM on ESXi
Upgrade the 8.6(2) VM to v10.5.x (via PCD I guess)
Test then discconnect BE5K
If I am correct, will 4-hour be enough?
I also saw some other suggested to do in-software upgrade to 9.x than export... I just feel that is too risky...BE5K is already a single point of failure what happens if in-software upgrade failed...

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