さえ〜ば
If only ~ / as long as ~
N3
Meaning
If only ~ / as long as ~
Formation
Verb（ます-stem）+ さえ + すれば
Noun + でさえあれば
Explanation
This structure expresses a minimum necessary condition.
Key nuance:
That one condition is enough.
Other conditions are not important.
Often used in hopeful or conditional statements.