I’m 18 working a under the table job, making $2,400 a month, and have been saving up for a brand new or fairly used challenger, I want to put down 10k and finance the rest but have had a few issues as far as credit. I don’t want a high apr nor high monthly payment, any suggestions or advice?
When you apply for a loan with a bank, credit union or auto dealership they will want proof of income. In the United States they will want to see pay stubs any maybe even a W-2 from last year, other countries will have similar requirements.
Under the table income doesn't come with proof of income. You also have a problem regarding taxes, you still have to report that income. If your boss has been paying you under the table they may also have tax and legal issues they need to address.
The use of 10K to buy the car in the United States won't trigger an issue, unless you are bring the physical cash. If you use a personal check or a cashiers check to buy the car the bank and the dealer won't have to report the transaction.
It is likely that you will not be able to get a loan at this time. Yes people who are actual contractors do get loans, but the still have to document the income to get a decent rate, and that can be harder to do compared to regular income.