Yes shipping F/T is very expensive and must be shipped with dry ice, unless you buy really large quantity of different sizes it's not always worth it for a snake buying from someone local or a show maybe a better option.
Hognose eat a lot generally speaking we are talking 2 to 3 feeding a weeks until they are 25 grams, 2 feeding until they are 75 to 100 grams and one feeding a week after that.
They will start showing some serious growth once they start feeding on ore meaningful prey (large fuzzy small hopper).
Over the years I have bought feeders from various place and my 2 favorite are perfect prey and american rodent supply (I tend not to buy from Rodent Pro)