Good luck! I believe snail eggs are pretty resilient, so as long as the conditions are more or less equal in humidity and temperature, I don’t think you’ll have any problems. I know that people who keep snails as pets can have a hard time PREVENTING unwanted clutches from hatching! Just make sure that whatever substrate the eggs are on is sterile, and you should have the beginnings of a captive-bred colony that you can be relatively certain are healthy and safe.
Shipping live would present MAJOR difficulties in the U.S., depending on the species. Due to fear of snails and slugs becoming invasive, there are serious federal regulations preventing most species from crossing state lines. Some species are outright forbidden to own, countrywide (giant African land snails being the most infamous example). A short overview can be seen here: https://petsnails.proboards.com/thread/16277/shipping-snails-slugs-legal-info
Feeding them live CAN be an option, but only if you have a source of captive-bred, live snails available to you in-state. The conventional wisdom of “don’t use anything you find in the wild as a feeder” applies doubly to mollusks, because of the very dangerous parasites they can transmit (this is also partially why federal legislation about transport is so strict). Cooking at high temperatures for extended periods of time mitigates the risks greatly, but sadly… it can be nearly impossible to know if mass-produced, pre-cooked snails were managed in a remotely humane way, as animal cruelty laws rarely extend to invertebrates.
Snails that end up as “human food” like escargot are typically boiled alive (despite a wealth of scientific evidence indicating that they can and do feel pain, and will make every effort to escape from it), with reports of some individuals still moving on the customers’ plates in restaurants. Because there are very few regulations on the treatment of invertebrates, this is industry standard. Most data we have on humane methods of harvesting snails for food comes from researchers attempting to avert suffering in test subjects, pet snail owners faced with fatally injured or sick animals, and aquarists and herp keepers who either need to eliminate invasive species in their tanks, or provide mollusks as food for other animals. The main point I’m building up to being: because of the lack of impetus or pressure on the industry, raising mollusks as food humanely is more complicated than it should be. There aren’t well-established practices for it, because it was and is simpler/cheaper for major producers to do it horrifically. I imagine there are different levels of what I’ve described, and some producers probably provide a quicker end than others (when humans are the intended consumers, humane treatment often takes a backseat to texture, flavor, or other nitpicky factors—whereas I’ve never seen a cat leave a bad review on Amazon because their canned chicken pate was too “tough” or “stringy”). I have no opposition to providing meat for my carnivorous/omnivorous pets—quite the contrary!—but it has to be done the right way, and as it stands… I have no way of verifying which manufacturers are or are not taking decent treatment of their “livestock” into account.
Hence, the appeal of small-scale breeding and transparent practices within the community itself! People who love animals enough to be fussed over giving them the best diets and conditions are most often the kind of people who will show compassion and respect for the feeders they raise in-house.