i own a 93 toyota camry le
I put in subs cold air intake all new speakers a new deck and did some engine work
im looking into a body kit, lambo doors, headrest moniters, a flip out screen audio deck, i want to make custom headlights ,and i want to put in racing seats , racing harnesses, a custom turbo build, and so much more
i just got done with most of the interior . it is now a blue and black theme rather than the stock brown i was post a how to article soon
i ended up stripping the interior to do vinyl repairs and changing the color ( i highly reccomend duplicolor vinyl paint for any interior work i had a great experience with it and it has not let me down the only down side was if you dont let it cure your car will smell like spray paint for about a week)
i had underglow on my car but it was a crap product i loved the brightness of the leds but neon is the way to go the leds shorted from rain after a week of it pouring
i recently installed a modified shift knob that took a lot of custom fabrication to get in but it looks nice
i custom fitted some new vents and fabricated some pieces to replace stock ones for a stronger fit
i have a custom exhaust that still needs work i took it all out and replaced the resonator with a cherry bomb and welded it in ( amazing product it sounds great) and took out the muffler to replace but i cldnt fit one because i need an aftermarket bumper  once i get one i will install a y pipe to put in dual exhaust
any questions feel free to contact me

thats cool. i am interested in doing the inside of my car as well!!!! maybe you can put a DIY!!!

Sounds like you've got it all planned out. Good luck to you! be sure to post pics every step of the way!