We own a childcare business (although in Scotland so under different regulations) and it's certainly not easy. Few things to think about:
-do you have the appropriate qualifications to be the official manager of the nursery? I've had a quick look and it looks like for EYFS you need to have a relevant level 3 qualification and at least 2 years experience in early years, which I think from what you've said you wouldn't have. This means that you need to...
-hire a GOOD manager. They're hard to find, especially if you are effectively setting up a new business where there is inherently a lack of job security. Realistically you probably don't want someone who is taking their first managerial role either, you need someone experienced as there is a lot more to think about with a new setting
-it is hard to find and retain good staff, a lot of nurseries have a pretty high turnover. You can reduce this (we've managed to keep all our staff since opening) but it takes work and interviewing childcare staff is a slow and frustrating process - we had a very high number of people who just didn't show up.
-Income: it can take a long time to build up a reputation so you might be very quiet, but you still need to have enough staff to cover your ratios and to cover for sickness, holidays, random departures...it's tough.
-Paperwork. Oh dear god the paperwork! You will need policies and procedures in place for everything you can think of, and then more.
-Dealing with clients can be very hard work and time consuming, I'd imagine teaching is similar although in a lot of ways I think nursery would be worse.
-Costs; it's expensive. Staff costs are increasing, you go through an insane amount of toys, art equipment, cleaning materials etc. If you're running a larger setting you might need admin staff (unless you're going to do it yourself), also think about things like payroll, accounts etc as this takes quite a bit of time and is easy to get wrong unless you know what you are doing.
The big question is whether there is a lot of excess demand in your area. Do you know what the market is like? If there's a shortage then it will be a lot easier to get going whereas if the markets pretty balanced you're relying on competing against the established nurseries which is much harder.
I'd definitely try to find out why the nursery closed down and also what its reputation was like before hand as even though it will be a new nursery under new management with new staff people tend to remember bad reps and they can be very hard to shake off.