Sattva Lake Ridge: Real costs & builder trust?

Okay I'll be honest — I completely underestimated how many hidden costs there are when buying property. Just closed on my first flat last month near Gachibowli, and now looking at Sattva Lake Ridge as a potential investment or for family in a few years. It's an upcoming project, so I'm a bit wary. Does anyone have experience with Sattva's past projects in Hyderabad? Like, do they stick to timelines and quality for upcoming stuff? My recent purchase had so many unexpected charges post-agreement. What's the real total cost of ownership for their projects, beyond the advertised per sqft? Any insights on their builder trust factor would be super helpful. Don't want to get caught off guard again.