Can anyone speculate on how much of a credit line C1 will give to me if I have a decent income (via my employer) but a small business income < $500?

In the past year I applied for both Chase Ink Plus and later the Amex Starwood business cards stating identical incomes for each. Chase required multiple calls from a branch advisor to get me approved with a $5k limit. Amex was instantly approved online with a $15k limit.

I have a $6,500 purchase coming up that cannot be split onto multiple cards. My fear is getting approved for a C1 Spark biz with a $5k or $6k limit.