You can lease equip for sure, It may require a deposit but If it breaks they fix it. Also aside from the cost of all the overhead don't forget, that you need a salary to live off of too. A lot of people forget to include the money they will have to pay themselves for a year or two into the total money borrowed. Most people have a lot of expensed they forget to about. Aside from feeding and clothing myself I also have the responsibility of a house, a car, suv and most expensive a wife.
Most gyms won't see a profit (getting them out of the red) till about the three year mark, two if you're savvy and have a big draw.
It's a real risky business, but hey man you do get to have a business doing something you love.
I'm not a risk taker so I work a 9-5 and wear a Tie every day (with the exception of casual Friday where I can wear a Polo) I make good money but I work for a corporation. At first I hated it, doing a job I hate, but after 5 years with the company, I know work in Human Resource. It's kind of fun to determine who we hire. Pretty cool power trip.
I admire Gym owners, most will never get rich but you can live your life knowing that you got paid to do your hobby.
If you're a risk taker go for it, if not Post your resume on Monster.com