Husbands unit is sending him to NTC and making us pay for him to get back

Yeah I can’t express how pissed I am. We’re a high risk pregnancy with preeclampsia- and they know we’re due the week after they leave. Apparently we get to pay for my husband to come back. The ticket is approximately 250$ and we just don’t have that kind of money to just drop when they’ve been telling us FOR MONTHS that he wouldn’t be going