I can only go by what you tell us, but low credit and low income make it very difficult to recommend you buy. The first thing you'll likely need is a down payment. With low credit scores, you may qualify for an FHA loan, which requires 3.5% of the purchase price as down payment. Your monthly payment however will be higher due to the large amount borrowed and the required Mortgage Insurance FHA and other low down payment programs have.
You may be best off focusing on saving money and improving your credit scores. If the house you are thinking about is gone, it wasn't meant to be. Getting your credit straightened out now, while you are young and learning how important it is to keep it that way will pay you huge dividends over your lives together.
2) Buying a home for sentimental reasons may not be the most sound way to make one of the largest financial investments of your life...be cautious.
3) Your best option is to consider where you want to be 3 yrs, 5 yrs and 10 yrs down the line. Speak to your accountant or the mortgage broker with whom you are considering getting a loan from.
4) Sit down with your husband with a blank sheet of paper and list all that you have of value..then another list of all that you owe. How long will it take to pay off what you owe? Discusss this with your other half.
5) How much cash do you make each month? Are you ready for a mortgage, insurance, taxes and maintenance on a property?
When thinking of buying take slow, steady calculated steps.