1. What is the 2.5k tnb fee for? Usually this is around 1.7k.sound on the high side. Check with tnb to confirm.
2. Tnb form ie runner fee to help u fill up and submit. Price is ok. Although sometimes u can get 600-800 bucks if u look hard enough.
3. 1.5k for wiring from meter board to your house DB. Need to know the spec and does this include good grounding works since u r upgrading from single phase to 3 phase.

Also is your new DB board 3 phase ready?