I don't think institutionally-owned SFH rentals are viable in the long term.
Apartment complexes make sense as rentals because there's a great deal of efficiencies vis-a-vis property maintenance & management. Plus the added benefit of greatly reduced property taxes per unit. The downside is that they don't appreciate as quickly as other real estate can.
SFHs make a lot of sense for small-time landlords because they can be bought up in increments. But even small-time landlords pretty quickly realize the value in multi-tenant rentals and move to acquire more of them.
Blackrock, et al, will hold onto these so long as they continue to appreciate at double-digit rates. But after a few years of inflation-level appreciation, they will begin to dump these as their profits tumble due to the inherent inefficiencies of SFHs.