HA Design Question - Do you use the MS in 2nd site on the 1st site MSL?

Hi,

We're just looking at re-doing our SEP design - we currently have one SEP site, containing 2 MS's, 1 DB server (SQL) - All clients have the MSL configured to point to the second MS in the event of a failure. Everything is hosted in one Data Centre. We want to achieve both MS and DB redundancy by utilising our second DC which contains all DR related infrastructure.

The plan is to install a second SEP site with 1 MS and 1 DB server. All clients in the second DC will then point to this SEP site , replication with the 1st SEP site will be enabled and we will decomm the second MS in the first site, amending the 1st SEP site's clients MSL to point to the MS of the second SEP site, located in the second DC.

Does the above sound viable?