92 Grk “to complete it, lest.” Because of the length and complexity of the Greek sentence, a new sentence was started here in the translation and ἵνα μήποτε (hina mēpote, “lest”) has been translated as “Otherwise.”
93 The participle θέντος (thentos) has been taken temporally.
94 The words “the tower” are not in the Greek text, but are implied. Direct objects were frequently omitted in Greek when clear from the context.
95 The word “it” is not in the Greek text, but is implied. Direct objects were frequently omitted in Greek when clear from the context.
96 Or “mock,” “ridicule.” The person who did not plan ahead becomes an object of joking and ridicule.

In other versions

Otherwise, when he has laid a foundation and is not able to finish, all who see it begin to mock him,

For if you lay the foundation and are not able to finish it, everyone who sees it will ridicule you,

Otherwise, after he has laid the foundation and cannot finish it, all the onlookers will begin to ridicule him,

Otherwise, you might complete only the foundation before running out of money, and then everyone would laugh at you.

Otherwise after he has laid the foundation and is not able to finish it, all who see it will begin to ridicule him,

Lest haply, after he hath laid the foundation, and is not able to finish it, all that behold it begin to mock him,

Public Domain