Texas Civil Practice and Remedies Code - CIV PRAC & REM § 15.002. Venue:  General Rule

(1) in the county in which all or a substantial part of the events or omissions giving rise to the claim occurred;

(2) in the county of defendant's residence at the time the cause of action accrued if defendant is a natural person;

(3) in the county of the defendant's principal office in this state, if the defendant is not a natural person;  or

(4) if Subdivisions (1), (2), and (3) do not apply, in the county in which the plaintiff resided at the time of the accrual of the cause of action.

(1) maintenance of the action in the county of suit would work an injustice to the movant considering the movant's economic and personal hardship;

(2) the balance of interests of all the parties predominates in favor of the action being brought in the other county;  and

(3) the transfer of the action would not work an injustice to any other party.