Did you get a trailer yet? There are many trailers to choose from. I have a very basic trailer that I outfitted with bins. I’ve had it for 17 years and it’s still a very good trailer for my needs. It’s a Haulmark trailer.
There are many other nicer trailers with many bells and whistles. Some have track heaters in the floor along with boot, glove and helmet heaters. They are using a standard RV trailer furnace with ducting to provide the heat. Some come with nice cabinet options as well as fuel cells for fueling sleds from the trailer.
Really depends on where you are going to use the trailer and what you needs are.