Almost. but the extras we can pay for it out of our own pockets', you have implemented a relatively nonstandard use of self-referential anaphora. The third person, singular, impersonal, object pronoun 'it' is unnecessary, and the noun phrase 'the extras' is sufficiently informative for its purpose.
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PreciousJonesYes, it will be more than $500, but the extras we can pay foritout of our own pockets.
Is this sentence grammatically correct? no
1. Omit "it".
2. The underlined does not have the usual word order, but you can hear t