Payment plan hacks for NRI investors in Greater Noida

Since January I've been shortlisting flats in Greater Noida, especially around Sector 16A near Film City. I'm based in Dubai, so site visits are impossible for me. Looking at Eros Group projects, but payment plans ko lekar thoda confused hoon. Builders mostly push for construction-linked, but does a higher upfront down payment actually give better negotiation power ya koi real spot discount? Meri understanding hai ki bank-funded projects mein thoda flexibility milta hai, but self-funded mein zyada control hoga for an investor like me jo physically wahan nahi hai. Hidden costs se bachne ke liye, payment plan mein kya negotiate kar sakte hain? Yaar, power of attorney se manage karna kitna risky hai? Any hacks for NRIs to ensure project transparency and timely payments? Kya ROI pe farak padta hai based on the payment scheme chosen?