Wahrscheinlich hast du das eh gelesen, aber im License agreement steht das denke ich ganz gut drin:
Which Version You Can Use - Unity Personal Revenue Restrictions
Except for a thirty (30) day trial period, Unity Personal (including the iOS and Android platform deployment options) may not be used by:
Commercial Entity that has either: (a) reached annual gross revenues in excess of US$100,000, or (b) raised funds (including but not limited to crowdfunding) in excess of US$100,000, in each case during the most recently completed fiscal year;
Non-Commercial Entity with a total annual budget in excess of US$100,000 (for the entire Non-Commercial Entity (not just a department)) for the most recently completed fiscal year; or
an individual (not acting on behalf of a Legal Entity) or a Sole Proprietor that has reached annual gross revenues in excess of US$100,000 from its use of the Unity Software during the most recently completed fiscal year, which does not include any income earned by that individual which is unrelated to its use of the Unity Software.
Als juristische Person solltest du ab einem Umsatz bzw. einem jährlichen Budget von >100.000 USD die professional Version verwenden.
Als Privatperson bezieht sich der Jahresumsatz von 100.000 USD tatsächlich auf die Umsätze die durch die Verwendung von Unity erwirtschaftet werden konnten.
So ist jedenfalls meine Auslegung.
Das mit der Miete sehe ich genau so wie du.