OP, I have a question that you might have answered in your original post.
At what point did the bug bite you enough to say "**** it" and get serious about track usage?
At first I was only doing a couple track days a year, when doing a pair of events each month and driving the car to and from the events in 2013 I got a coach (mentor) and after some conversation decided it was time to commit to it. First thing was to get a trailer and truck, then start focusing on roll bar/safety equipment for the car. It was a bit of a tough pill to swallow buying a trailer and truck, but after a couple AAA tows home from the track it only made sense as the lap times were falling fast.
When you start pushing things it is time to consider having a tow ring as it allows you to get home easily if anything happens. It also makes for much better time as you can leave the track tires on the car with a more aggressive alignment without the worry of trashing the tires putting miles on the car driving to and from the track.
Being able to leave the car at the track and take the truck to the hotel or home also makes life a lot nicer, it also offers more storage space for tools/place to sit and relax out of the sun or rain/snow.
I had an axle break at Palmer in 2016 at 130+ which resulted in a spin going into turn 1, I have been mulling over that I would hate to wad this car up, so I backed off pace there as was running mid 1:50's, which for a street car is fast. But more safety is on the mind with a fire system due to slow response time at tracks like Palmer where you could be off in the woods.