Price point looks reasonable but does it include running concealed or just external trunking? Also the lights/fans charges seems reasonable as you are doing multiple jobs so he can exclude transportation charges from the single charge.

Just need to confirm with him that all cables, switch, plug n socket are Sirim approved.

I would think lucrative is a relative term.

I got my bro's electrical contractor to lay new wiring for whole house, add plug points, lighting points, replace main db plus add sub db. He is on the registered competent electrician list. He told me his earnings from doing large project vs small ad hoc works does not differ much, but the larger project mean longer duration and more stable income.

Apologies, he is more of doing my Bro a favour as he is already booked for other projects.