The roof surface, at the front, was about 2000 SF. All draining to little gutters at the front.
The turret gutters had no sownspouts, just open ended and draining to the lower roof.
And, notice, from the original picture, that there were small (maybe 6 SF) roofs over the lower windows. No gutters.
The two areas on the sides of the front door, had the grade high. There was water coming over the foundation wall in the unfinished basement area at the front. Sill plate was saturated.
The builder sent a couple of guys. They caulked the stone / foundation wall interface, after pulling out the weep wicks.
BUT, those small windows, on the first floor, had limestone sills. No flashing under those sills.
So, the water was running over the gutters (which were WAY too small for the roof SF) and it was pouring unto the small roof section at the 1st floor, then running, directly, onto the limestone sills. There, it penetrated and went down, between the stone veneer and the Tyvek over the wooden sheathing, and then into the basement (Bad flashing at the base, confirmed by drilling a hole in the sheathing, just above the sill, and putting a Rigid See-Snake in).
So, some bad workmanship (the base flashing AND the bad repair attempt), but also an Architect defect (for too small gutters draining sich a large area.
I would advise that more HIs ge some training in building science. Then you can do consultations for owners and builders and subs.
More business, and revenue, but with less work and hassle.
Work smart, get paid more, do less work.
That is how to survive these tight times.
Hope this helps;