What builders don't want you to see on site

Landlord raised rent again, that was my final straw. Finally taking the plunge in Mohali, looking at Satya Merano Greens but yaar, I'm so confused. Everyone talks about the glossy brochures, but nobody really tells you what to actually look for during an under-construction site visit. Okay, I'll say what no one says: many builders just show a plan and promise amazing amenities, but the actual construction quality at early stages often looks like a jugaad. How do you spot potential red flags for seepage ya cracks later on? Is it even possible to judge the real quality of fittings based on what's visible now? Change my mind, but I feel like it's all a gamble.