as weinstein5 explained in one of the earlier post.
Go with DRS, it will do the job for you.
as it looks after Initial Placement of VMs and also vMotion migrations in case of load imbalance.
if you are worried about many vMotion migrations, adjust DRS migration threshold as per you need, along with that DRS is also capable to work in Fully Auto, Partial Auto or Manual mode.
More About DRS
VMware vSphere: Hot & Cold Migration - DRS - YouTube
https://www.vmware.com/pdf/vmware_drs_wp.pdf
Best practices for Horizon View