With your current income levels, I'd say you're only chance at buying a home in that price range would be in TX.
If you decided on TX, I'd also say that you could certainly find a house for less that 180K that would be adequate for a family of 5.
Unfortunately, the information you're providing isn't enough to give you an answer. There are several things that would have to be factored in the equation.
1: Do you have a single or double income household? If it's single and you have separate finnances your husband may be able to qualify for a loan. Being the case that is score is O.K., I'd say you woudln't be able to hit the 180K mark unless you have a large down payment. The amount you can borrow, as a rule of thumb is 28% of your gross income. To borrow the 180 you'd need to put down around 16K and would need around 22K for closing costs. Not to mention some reserve monies. See this prequalification calculator
2: How is your debt situation? Owe money on cards, credit card debt, ect... This will be factored into the loan decision. It can also be input into the calculator link above.
3: The credit score is pretty important, I don't know where the cut off is, but it can affect how much you can borrow and at what interest rate.
It's possible some mortgage loan office would be willing to find a way to get you that loan, but I would suggest you take a very close look at your personal finnances and be honest with yourself. Can you really stretch the money as far as would be needed to buy the home. Don't forget that you may need to do repairs and costs of things such as general utilities go up.
Just because you can get a loan, doesn't mean you should accept it. I'd also suggest staying away from ARMs because interests rates right now are very good and ARMs have a very good chance of increasing in the next few years.
Good luck with the home search. Depending on where you are in TX, 150K can buy you a decent starter home.
As an owner, there are additional costs that you need to accout for to meet $1000.00. First of all, I'm guessing you got the 180K number by going to something like bankrate.com
A 180K would put you at around $930 a month, but this number is only PI. Principle and Interest. The rest of the equation includes TI, Taxes and Insurance. Taxes would be around 2 - 2.4 % in Texas every year. That translates into about 250 to 300 a month just for the taxes. I'd guess the insurance would run near 65 to 80 a month. That would leave you around $670 for the loan, which would put you in the 100K to 120K price range.
It's possible to find a house in TX on this budget, just depends where you're looking.