Below a financial overview of his assets when Elvis died.
As you can see he only had 1 million dollar left in his bank savings account.

That's why Vernon accepted the financial offer to do the CBS show.
And even if Elvis would like to take a rest, he really could not, he had to keep touring from going bankrupt.

It's so amazing to see that he trusted Vernon in doing the financial
administration, while he could have talked to financial advisors for
how to invest his money best.

The result of Elvis spending too much money, poor agreements with his
manager and Vernon who had no clue about investing money, resulted in
Elvis dying in relative poverty.

He could have had 100 m $ on the bank but only had 1 m $ left !

Sad actually.