the only difference “real estate professional” makes is that your losses are not limited to $25k if you are a pro. (the activity is not passive)
that’s 750 hours total in the real estate business
material participation is defined as:
You participated in the activity for more than 500 hours.
Your participation was substantially all the participation in the activity of all individuals for the tax year, including the participation of individuals who did not own any interest in the activity.
You participated in the activity for more than 100 hours during the tax year, and you participated at least as much as any other individual (including individuals who did not own any interest in the activity) for the year.
The activity is a significant participation activity, and you participated in all significant participation activities for more than 500 hours. A significant participation activity is any trade or business activity in which you participated for more than 100 hours during the year and in which you did not materially participate under any of the material participation tests, other than this test.
You materially participated in the activity for any 5 (whether or not consecutive) of the 10 immediately preceding tax years.
The activity is a personal service activity in which you materially participated for any 3 (whether or not consecutive) preceding tax years. An activity is a personal service activity if it involves the performance of personal services in the fields of health (including veterinary services), law, engineering, architecture, accounting, actuarial science, performing arts, consulting, or any other trade or business in which capital is not a material income-producing factor.
Based on all the facts and circumstances, you participated in the activity on a regular, continuous, and substantial basis during the year.