admin portal as a client?

I am wondering if there is a way to use a temporary instance of RHV-M to setup a host for local storage, etc. andthen to create a new production instance of RHV-M and continue to manage the same datacenter and host?

I notice adding a new RHV-H host to a fresh instance of RHV-M doesn't bring in any of the configurations for the network, local storage, etc. In vmware you'd just use the ESXi client, since RHV doesn't have any lightweight client, does losing the RHV-M vm lose the whole datacenter configuration unless you had a backup? I can't use hosted engine, that won't help in my case, and i'd like to be able to use a temporary instance of RHV-M if my production instance was down.

Thanks,