I'm not sure it would actually be cheaper than a first class ticket. I'm not very familiar with cost of shipping, so I'm going off very rough numbers her, but [1] UPS lists next day air shipping for packages over 100 pounds to be between $2 and $7 a pound. Maybe these aren't the correct numbers to use, but even if it costs $3 a pound, we're looking at $450 for a 150lb person. That's not including the weight of any accommodations. And that's assuming pretty much the low end of shipping costs for non-human accommodations.
[1] https://www.ups.com/assets/resources/media/en_US/cwt-rates-p...