Its tough for me to consider any options without more information.
Two main missing pieces of information are, what is your financial situation outside of having $50k in hand and what kind of "new real estate venture" would you invest in with your father?
If you just moved to Houston, was that part of a job transfer by your current employer or have you just changed jobs? Can you qualify for financing to leverage your cash or will that be after some time on your job?
If you invest with your father, how long is your cash expected to be deployed before you expect get it back? This might be your best option, if you are looking to fix and resell until you are in a position to be able to qualify for long term financing. With your dad's experience and your cash, you should be able to qualify with asset based lenders. That won't be the case for long term lenders (banks/mortgage companies) that you want to use for a house hack type of long term deal.