Pulled the trigger on an inventory 2019 Standard Range!

I have been driving a 2015 Model S 85 which I got through the CPO program 3 years ago. After searching inventory the previous two weeks, I finally scored a 2019 Multi-Coat Red Standard Range inventory model with 1k miles on it. I ended up getting it for $71,590 which is identical to what I paid for my CPO 3 years ago. I am having them remove the vaporware FSD for 7k was it was listed at $78,590. Red wasn’t my first choice but pickings are slim if I wanted a 2019 SR model and I was afraid I would lose out on ever grabbing one. I’ve never owned a red car before so this will be a first.

I realize I am not getting the latest battery technology with range, but I don’t take a lot of trips and have never had an issue with range on my 85D. It was worth it for me to save 10k and still get a Raven model with AP 3.0 and all of the latest improvements.

Now, a few questions:

1) Unfortunately, the car comes with 21’s which I know can be expensive to repair with damage and wear heavily on the tires. I am considering buying new 19 tires and rims and selling the 21’s. I live in NY, so we get snow, etc. Thoughts?

2)Thinking of getting Xpel Ultimate on the front (does that include bumper and hood?) and possibly Ceramic Pro also. Thoughts?

3) Tesla offered me $37,700 for my 2015 85D with AP which has 40k miles and is in pretty good shape. With the tax trade in savings, that comes out to closer to $39,200. I was expecting a worse trade in offer. The KBB for private was 47k and trade in was 42k. Thoughts on this offer?

4) Anyone have a bad experience buying a showroom/demo unit?