Need some insight

just started my own business doing this and have a lot to learn still. I have my crew that can do most things that I would need but like the blown in, vacuum, air sealing, solar attic fans. what I have noticed is that most homes I go into are not ventilated. They are missing either exhaust or intake. today I went into a home 2800 sqft, I see some ridge vents, but zero intake. this roof is about a year and a half old. The previous owner decided to put batts in the rafter bays and then keep it up with radiant barrier from the very bottom to the very top. I guess he was trying to turn it into a conditioned space. he left the old insulation on the attic floor as well. brand new AC system that looked good. Customer complains about humidity in the home. My leaning is to take this hybrid conditioned/open attic that I'm seeing and turn it into a open attic thats properly ventilated. take down the radiant barrier/ batts, add intake, vacuum, air seal, blow in r49 and call it a day.

is that the right path? and if so my intake solution would be passive air hawks near the bottom because there is no overhang for soffits on this old home. Because its a new roof i would be worried to try to do any smart vent.

this is my 1st post on reddit but i hear this is where all the smart people are at.