In Florida all pools now must be enclosed in at minimum a screened in area. It has been that way since I was a kid due to so many accidental drowning of children. I know the one I had was completely indoors with glass over screen windows on two sides of it and rest of the house on the other two sides. Roof over was part of the house also.
I think if varies by county in IN. Where I live you
must have an approved 'automatic cover' that is closed when the pool is not in use or have a full fence at least 6' in height with the door able to be locked from the inside. Believe it or not, in most cases, the cost is about the same. I agreed with my wife that the fence would keep leaves, critters etc. out of the pool. We generally have enough mice, moles and frogs commit suicide each summer night that mornings require a few minutes of disposal time of such.
I installed pools in the summers when I was in college. When I put in my pool about 8 or 9 years ago, I was surprised that not much at all had changed since the early 80's. Liner quality had improved and you can now get thicker mil (both side and bottom) than you could then, but pumps, filters, plumbing, construction techniques etc. really haven't changed. I helped my mom in FL when she had a pool put in and I just couldn't get out of my head that there was no worry about how deep you kept lines to be below the freeze zone. Heck, I even have one of those cameras that you can run down drains and pool runs to see what is causing the clog. It's come in handy with having rent houses. I suppose you could do your own colonoscopy with it, but the built in grabbers (to clear a clog or grab a ring etc.) would likely be a bit painful.
