My 3BHK dream turning into a payment nightmare

Honestly not sure if we made the right call with this SARE Homes 3BHK in Siddhartha Vihar. The construction-linked plan is just draining us. Now they're demanding a huge, unexpected PLC payment. My wife's worried about the kids' school admission if we delay. Is this normal for Ghaziabad? Should we have just kept renting?