A major factor that you must take into consideration is your market demographics. we would all love to see you open a balls-to-the-wall gym that offers everything from primo showers and dressing rooms to a full servie juice and supplement bar, but unless you are in a metro area your market will not support your investment; hence, YOUR DOORS WILL NOT STAY OPENED LONG. If you are in a metro area, I would agree with DADAWG. If you are in a smaller city that probably couldn't support a "Gold's" type gym, then i would stick to the basics. Something that I have found to be very attractive is a full set of preloaded (set weights) barbells (like for curling and presses) ranging from 20 - 160 lbs or so. Of course, you should have plenty of steel and a full range of bumbells (up to 150). Adequate cardio equipment such as treadmills, stationary bikes, stairmasters, elipticals. Also, it is a must that you remember the "older" population. Have smaller weights and adequate machines for them. Make sure you have enough benches, squat racks, power racks, dip stations, pull-up stations etc. I would definitley suggest aerobics classes throughout the day taught be certified instructors. Having a few certified personal trainers on staff would also be beneficial, espacially for the women and older crowd. Remember, base all your decisions on your market demographics. DO your research or you'll be sorry. Opening a gym can be a substantail investment. I have seen too many GREAT gyms go under because the proper research wasn't done before opening them. Good luck Bro.