Qualifications to become Guru-One Must be a Paramahamsa, and no less.
What that means is given below.
710409SB.BOM Lectures
So anyway, our point is that paramahamsa means one who has no such
dirty things in the heart, bhukti-mukti-siddhi. All, they are dirty
things. Bhukti means material enjoyment, mukti means to become, to
merge into the existence of the Supreme Lord, and siddhi means
yoga-siddhi. So they are all dirty things. So such dirty…, a person
with such dirty things, he is not paramahamsa.
He may be a sannyasi,but he’s not a paramahamsa.
Paramahamsa means who has no dirty things.
anyabhilasita-sunyam
jnana-karmady-anavrtam
anukulyena krsnanu-
silanam bhaktir uttama