Basic Bathroom renovation - Supply and install all - Estimate / Fixed Price.

Single Level, good roof access. 10m from switchboard if that is relevant. Prewire & fit off, supply and install 2 downlights similar to a mid range, moderate 7 bar heated towel rail, extraction fan and double power point for the bathroom. 

4 weeks between prewire & fit off.

Make any other assumptions you like/need.