How huge does subsidy-free need to be?

How big is huge?

This article from Solar Power Portal describes 120MW as a huge solar farm:
Second huge solar farm in the works as INRG plots 120MW post-subsidy array | Solar Power Portal

Hampshire-based INRG Solar is plotting a 120MW solar array near Scunthorpe in what could be the country’s second proposed solar farm of significant infrastructure status.

And the project, which is expected to enter planning later this year, could also be developed alongside a 50MW battery storage facility.

Cleve Hill’s scheme is almost three times larger, but according to Hive energy their project has to be 350MW in size to make it financially viable. So exactly how are INRG able to come up with a financially viable scheme at 120MW? What are Hive not telling us?