No, you can move anywhere you choose. However, the program can only pay for moving costs within 50 miles of the buyout property. Any additional mileage above 50 would be covered by you.
Harris County does hope you will stay and is offering a locality incentive of $19,875 to encourage you to do so. To qualify, you must purchase a home in Harris County, have income under a limit set by HUD, be a legal resident, be compliant with the requirements of any prior disaster recovery assistance received, and supply all necessary documentation for this Buyout program. Funds can be used for any purpose, including as part of the payment for a replacement home.