Knowing how much you have to spend each month on a home mortgage is very important when looking to finance Jacksonville FL real estate. It all comes down to how much you owe versus how much you make. There are some general guidelines to keep in mind considering that lenders are not enthusiastic about loaning to those who will become overloaded by other debt. First of all, figure out how much money you are bringing in each month. Any income that cannot be documented cannot be included when applying for a loan. Sources such as lottery payments or alimony may be included in your income. Once you know how much you make, you need to figure up how much debt you have. This includes credit card debts, personal debts, monthly obligations such as alimony or child support, and installment loans. If a debt will be paid off in six or fewer months, it is not included.