Ghaziabad property buying: Hidden costs aur site visit tips?

Property ke hidden costs toh dimag kharab kar dete hain, honestly. Main Pilkhuwa mein ek 2BHK dekh raha hoon, Root2Home India Pvt Ltd ka ek project pasand aaya hai. Base price sunke toh theek laga, but ab samajh nahi aa raha total kitna upar jayega with everything. Stamp duty, registration, interiors, electricity connection, GST... yeh sab kitna add ho jata hai? Mera budget thoda tight hai, toh I don't want any last-minute surprises. Kisi ne recently Ghaziabad mein property li hai, unka kya experience raha? Total acquisition cost kitni upar gayi? Also, site visit pe kya-kya cheezein pakka check karni chahiye jo builder normally nahi batayega? Jaise water supply, cell network reception, society maintenance charges... kya-kya questions poochne chahiye? First time buyer hoon, thoda nervous feel kar raha hoon. Koi advice ya experience share kar sakta hai toh please batao.