Actually, I'm quoting figures from a typical rock/pop band with 4 members.
signed to a major label contract. On average for a first album, you get a $250,000 advance.
Out of that, you've got everything from managers and lawyers to equipment, stage design, lighting recording expenses. mastering, duplication, advertising etc....
A 5 week tour will cost about 60k for expenses. Any money made at arenas goes to the record company to pay back your initial advance.
Even if your first album sells 1/4 million copies, by the end of the year you'll still be in debt to the record company.