Hey guys newbie here, after a couple of weeks of research have decided to get a montero 4x2 instead of a fortuner am going to get my unit next week and would like to set it up as follows:

1. Change low beam to hid
2. Install reverse cam (preferably without drilling a big hole in the bumper) and lcd
3. Improve sound system (for better sound quality), preferably with a subwoofer

A few guidelines, would like to keep the stock hu (alpine). Dont like to take up additional space for the sound system (saw some subwoofer options below passenger seat). Keep drilling/modifications to a minimum and not void any warranties. Options installed should not look out of place in the car.

Is 60-70k enough for my wishlist above? If so what would you guys recommend and what shop should I go to (preferably one that can do all of these).

Lastly I'm thinking to wait a bit (5k kms?) before doing the modifications, or is it ok to go do all of these things right after getting the unit?

Thanks in advance