Before you waste a lot of money chasing the wrong solution. I would first spend a few $ and time on verifying your ambient temperature is the issue. You might find that just by increasing the temperature on both the plate and the hotend might solve the problem.
Corrugated box material is a superb insulator. Bambu exclusively uses double-walled corrugated boxes, and I never discard them. Instead, I cut the cardboard into useful stock pieces for various projects. Start with a low-tech approach to tackle the problem, and don’t hesitate to use temperature sensors on your machine to gather precise data about the issue. Keep in mind that much of the online information you encounter is bullshit and don’t trust anything you read that you haven’t test yourself, that includes this post I am writing now. 
I have a P1P with a pegboard enclosure so there is very little insulation. However, I have been able to successfully get it up to 110F using simple cardboard the saved the bubble wrap from the plates purchased since then. They are about the size of the side of the P1 series. I hold them in place with magnets.
Check out this thread from earlier in the year. There’s a lot of low tech innovation on display there including one where someone used a sweatshirt to insulate the chamber.
Remember, you can purchase a the skins for the P1S and still not have much of an improvement. I purchased the P1S front and back bezel only because they were cleaner and allowed my glass door to seal better.(purchased before the P1P-P1S upgrade was offered) and
Here’s a picture of my approach using the envelope one of my build plates came in. It was when experimenting with ABS. Note that I placed magnets behind my pegboard mod precisely to allow me to hold this on. I was able to get the internal temperature up to 110F with a room temp of 70F so YMMV.
This is a cheap Hygrometer and thermometer that runs on batteries. I didn’t much care for it as it is hard to see in dim light plus I thought I’d want to measure humidity but that turned out not to be as important.
https://a.co/d/36o6BXN
I love this one because it has two probes, one I put near the top of the chamber at the same height as the printhead and the other external to the printer so that I can measure the delta between internal and ambient. Plus, you can see it across the room but it requires USB power.
https://a.co/d/0ExB8mm
If you want four sensors, try this one. BUT… Be careful where you place these because the printhead will bang into them. There is no room except at the bottom and the very top where these sensors will be free of damaging something if it bangs into it. But what’s nice is that you get four sensors including humidity. 3 that are portable and one inside the unit itself.