N年前我从东部relocate到西部，relocation package

is standard. You don't have to ask for it. If they decide to hire you, then will give to you. Mine could go up to $100,000. And I actually used about $70,000. In addition to travel, short term accomendation (mine is 1 month hotel stay), moving expenses (I shipped a boat and 3 bedroom house contents, cost a lot!) it also includes selling your existing house, 3 mortgage points, mortgage interest differences for 5 years etc.

不过现在有这种package的很少。好日子一去不复返啦。you are very lucky.