He wants to hire you and can create a position for you.
He will likely hire you unless you ruin the incoming interviews with other team members.
Most of large firms give you a good relocation package, which covers all your moving cost, including temporal housing for a month or longer, movers, real estate agent fee, traveling fees (for looking for housing as well. mostly up to two times. foods during the travel.), and etc. If you have a house, the relocation company also helps you to sell the house for reasonable price.
You can also choose a lump sum relocation fee if you’d like to do all by yourself. It was ~$20k when I moved from mid-west to CA.
If a position disappeared after 8 days, it might be a similar case as you are now. It means that they had a strong potential candidate. It seems that it’s a way they typically hire.