Since he is military and getting stationed here, Maryland won't see any of his money in taxes other than sales tax. As for Housing, that depends on where he picks and what his BAH/BAQ is.Is working in MD and paying insane taxes, housing costs, and anti-2A laws really worth it to you? Do you have kids? Want them learning DEI and possibly anti American ideologies all while you serve America in your uniform?
Lots more to think over besides what firearms you can bring here.