Carefully box each kit in it's own bag, surrounding it with the typical popcorn packing material as well as having it sealed in a plastic bag, with some air pressure in it to keep some "float space". How you seal it is up to you. You can use anything from a heat gun to buying a kit that bags and seals food items for storage.
For a typical carton, I recommend that you can scrounge used photocopy paper cartons. These are basically discarded and thusly available all over.
Then plan on going to U-Haul and getting a hitch installed for the small trailer you are going to rent. Any remaining space can be used for excess luggage, microwave, model building supplies and tools, and various items you will need to do any quick-cleaning and set-up in your new place.
If you want to get squeemish about the cost of any of these, just look at how much money you have already sunk into building them, in paint, tools and accessories alone.
Tom
Tom T
“Failure is the opportunity to begin again more intelligently.”-Henry Ford
"Except in the fundamentals, think and let think"- J. Wesley
"I am impatient with stupidity, my people have learned to live without it"-Klaatu: "The Day the Earth Stood Still"
"All my men believe in God, they are ordered to"-Adolph Hitler