How would you prepare for a Cat 4 Hurricane? Would you ride it out or evacuate if it was voluntary?

If the piece of property you're staying on is NOT subject to catastrophic flooding .
If you can self sustain for 7 to 10 days you'll probably be OK

But if you can't provide freshwater, food, heat for a living and cooking as needed, refrigeration and power as needed, routine medications and emergency medicine as needed.
Don't have a way to deal with human waste and garbage as it accumulates.

Or the piece aground that you literally are trying to stay on is possible or likely to flood out making it unlivable then it's time to leave.

Leaving without my dogs isn't even an option for me, Id stay before id leave them behind.

I'm inland a bit, so we will get hammered with some rain and wind but the river and creeks have to rise 42 feet before my house is in danger of flooding.
That happened once in the last hundred years, I have 12 acres, the lower 6 has barn, practice MX track..the upper 6 has the house...the upper plot is 42" higher in elevation. 2005 creek rose 22 feet, covered my lower property and Barn... the house itself was never in danger.

If it gets that bad or worse again the dogs get loaded up, guns, ammunition food generator, fuel , cash and all negotiable items that I keep at the house go with me. If my wife is home she will take one one car as well.
The other car and everything else stays it's just property.

I used to live in South Florida. I've weathered several hurricanes, and I'm still here. My daughter's first birthday party was during a hurricane. I was in Miami when a Cat 5 hurricane was expected to hit. I was working at Miami International Airport at the time, and all the planes were evacuated and the airport shut down. It was weird walking through KMIA with no one around. Kind of like the movie "The Langoliers." Anyway, the entire city shut down. All city employees were sent home. At the last minute, the storm changed direction, and the next day was the most gorgeous one I had ever seen. I was happy that I had that day off!

I was also in South Florida for Hurricane Wilma. the eye of Wilma came directly over my apartment building. It ripped trees up, severed electrical lines and the water main. For five days, we survived on food that we had stockpiled before, water from the water main, and cooked with a Coleman camping stove. That stove also boiled the water for both drinking and bathing (everyone got one pot of hot water per day as the stove fuel was limited). The community came together and we had a big cook-out using everyone's perishable food on the first day.

Like any other crisis situation, if it doesn't kill you immediately, it is manageable if you keep your head and cooperate with those around you.

Still treading water up there in Houston?