First you have to determine what your budget is. You didn't specify how much you can allocate for rent and security, heat, electricity, water etc each month. Second is how familiar are you with the business. If you know next to nothing about it, go and work for some one first. (You didn't specify that either).
Third what does "good sized property" mean to you? Every occupation/business has different size requirements, (some are regulated in addition). Visualize the size in your mind with tables, chairs, and then put it on paper. Usually one inch on a graph equals 1 foot in real life. Put in the door way, exits, space to hold equipement and then you can have an idea of the size you may TRULY NEED.
Openiing a sucessful business requires thought, wise planning and above all hard work. Be minimal in your needs for the first couple years and work HARD. You will be sucessful. Good luck.