@Sherry Patterson is a great investor and agent in DFW. I have used her multiple times and have had borrowers I work with use her. She is professional and will work harder than probably any other agent. She also runs a meet up every 4th Monday of the month in Euless by the airport. Strongly recommend showing up to that to meet other investors.
I suggest staying in the $300k to $450k ARV range in Tarrant, Denton, and Parker Counties $350k to $550k in Dallas and Collin Counties. This is just above the median home price in each of these areas but you should still have a large buyer pool for a well rehabbed home. Work force housing is the key. Don't go high-end right now until the market adjusts more.
To give you some key metrics beyond ARV - I closed 141 loans for deals in DFW. The costs vs ARV on those deals averaged to 73.2%. This means the purchase + the rehab / ARV is 73.2%. If your costs come in higher than 76% of the ARV, then you are probably paying too much.
Hope this all helps.