Happy to assist you my friend! So, to answer your questions:
1. Excellent choice on the DR750X-Plus!
2. If you have 2 layers of limo tint, yes, it may be a moot point for the camera. However, you can cut away a very small section of tint for the camera to see through fairly easily which is what I would do.
3. Yes on the 256GB Samsung Card
4. You want Micro2 fuse taps (15A rated) and you will plug in 5A fuses installed in the dash cam socket, not 15A
They all come with a 32GB card, for the small price of the 256GB card, it is totally worth it. Based on your recorded quality settings in the Blckvue app, 32GB won't get you very far so don't cheap out on the card. I also HIGHLY recommend you get the Polarizing Filter for the camera as well.
www.thedashcamstore.com
Feel free to PM me when you have everything you need and I'll give you my cell to help answer and questions. Very easy installation so let's go!