If a home has an active mold problem, it probably has an active water or moisture problem. What mold remediation people sometimes do as well is use an IR camera to try to find unusually cold (thus damp areas).
Mold can't grow or spread without moisture, so a moisture problem is a necessary prerequisite for a mold problem.
So focusing on fixing any moisture problems is a great place to start. Feeling around walls and baseboards or climbing up into the attic in the hours and days after a big rainstorm is one way to get started without any equipment investment. Air circulation also helps dry things out, so make sure every space has some openings for air exchange.
Not explicitly true - dry spores get anywhere dust does.
Whether they become active growth or not is a different question.
Kind of like how there are plant seeds we don't eat directly, but we trick them into opening up and eat the sprouts.
use surfactants,
instead of particleboard, open edged gypsum board, and open grain woods in basements and attic rafters
where humidity and condensation are inevitable.
The presence of spores isn’t a problem by itself and eliminating them isn’t feasible.
(When your shower is improperly installed, for instance)