Please do not ever entertain interest only or option ARM financing. They are great ways to get upside down on your home, which totally defeats the purpose of being a homeowner (i.e. to own an appreciating asset).
Look into a FHA loan with your broker. The lending limit in all Texas counties is $200,160 (this took 1 min to find via google ->
www.fha.com). This number seems to be well above the price range you're looking at.
I would look into the following FHA loans in order of desirability...
30 yr fixed
5 yr ARM
1 yr ARM
Ask your broker about a 2-1 buydown on the ARM loans...this will lower your payment in year 1 by 2% points and 1% point in year two, then the rate you locked in the loan in year 3. The money you will save on this loan balance range will likely be more than you will pay (probably around 2 points) for the privilage...but more importantly, it will keep your loan payment lower in those first couple years when you're most vulnerable to be overwhelmed by bills.
An FHA loan requires PMI to be paid for the life of the loan...People balk at this when they shouldn't. Banks and brokers oversimplify the PMI removal process with customers...to get PMI removed on a conventional loan requires you to have 20% equity in your house. With 95-100% financing, you are talking years before that 20% happens. And if you get lucky with a fast appreciating market, you still have to get a new appraisal and pay the applicable removal fees ($500+) just for the privilage of having it removed. You can count on them making it as hard as possible to remove PMI even though they say just the opposite while pining for your business.
If you have good credit you should be able to get a 5 yr FHA ARM for around 5.75% with a 1/5 cap (no greater than 1% up/yr and no greater than +5% from original rate ever). If you're smart and do a 2-1 buydown here's what your payments would be on a 150k home.
Assume 2.5% taxes (312$/mo), 50$/mo hazard insurance, and $88/mo PMI for an even +$450/mo after P&I. You also need to plan on about 5% a year for utility bills and maint. That's an extra $625 a month. Add it all up and you get the amount it will actually cost you to own the home every month.
Year 1 - 694.67 P&I + 450 taxes, ins, PMI + 625 bills/maint = $1769.67 monthly cost to own.
Year 2 - 782.47 + 450 + 625 = $1857.47 monthly cost to own
Year 3, 4 & 5 - 875.36 + 450 + 625 = $1950.36 monthly cost to own
In year 6 and beyond your rate could increase 1%/yr up to a maximum of 10.75% in year 10. You will likely not hold the mortgage more than 5-7 yrs, though...most people refinance or move, etc.
There's a conservative look at what it will really cost your to be a homeowner. If you can not manage those numbers, I would strongly reconsider. If you have or can pare down other debt in the future, you can afford more mortgage...it's always better to have mortgage debt over car loan or credit card debt...1 works for you while the others do nothing but hold you back. If you walk into a car dealership with a checkbook and no research or plan of action you will get screwed. If you get an interest only or option ARM loan because of payment "myopia" you can expect the same.
Sorry for the rant, but hope it helps. I bought my first house as a regional FO...it can definitely be done. Good luck.