Multiple Exchange 2013

Hello,

I have home lab running exchange 2013.   Everything is working fine.

My question - I want to install another exchange 2013 within the same forest for high availabiity in the event exchange server 1 goes down.  What do you guys think?

Here my home setup:

Sever 2012 R2 with Exchange Server 1 (running all the roles)

Plan to have another

Server 2012 with Exchange Server 2 (this will also be running all the roles)

Thanks

RL