You are in Florida, that is important information, thanks for including it. That means that you are not worried about cold at all. The coop is a bit smaller than I’d like but with your climate you never have to lock them in there. If you build a predator proof run you can leave the pop door open at all times. That means your space is a lot bigger. Still, four hens would be the maximum for me with that.
They do not show a good photo of the inside. It looks like they might have two roosts but they are really low. Chickens tend to want to sleep on the highest thing available, that’s why you want your roosts noticeably higher than the nests. You should be able to raise the roosts if you need to.
That sets pretty low to the ground. If you build a run to include the area under the coop (which I would for the shade) you may have to retrieve eggs or a chicken from under there. I’d like it to be a bit higher so that would be easier. Maybe raise it a bit with a foundation, if you raise it enough you could feed under there to keep the feed dry and keep it out of the coop. That coop doesn’t have any extra space so I’d feed and water in the run.
I can’t see how much actual ventilation that has. That does not look like a ridge vent. With that overhang it could have a lot of ventilation around the top but I’m not convinced. In Florida the heat will be your problem so you need good ventilation. You may wind up cutting some holes up high. If you leave that pop door open 24/7 it won’t take much up high to get good air movement. With those two windows across from each other and the top halves open hardware cloth it won’t be horrible. But it says one ventilation window, not two, so I’m confused.
That’s more nests than you need but that’s not a real problem for you. When you position it I’d point the nest side north or where they will be in the shade so they don’t become an oven in the sun.
The doors are raised a bit to keep the bedding in, which is good. As small as it is that should not be that hard to clean out, you can reach everywhere without too much trouble. Whether you raise the roosts or not they are going to be in the way but you should be able to work around them. The lip on the nests look pretty low though. You may need to raise the lip to keep the hens form scratching the bedding and eggs out of the nests and to keep them from scratching trash (poop) from the coop floor into the nests.
A raccoon would not have that much of a problem with that bolt lock on the human door. It might work forever but I’d consider some type of hasp to secure it better.
Fir is a good rot resistant wood though fir heartwood would be even better. Still, if you raise that up off the ground on some type of rot resistant foundation it should last a long time.
$300 for that doesn’t sound like a lot. I’m not sure what the actual quality would be. You may need to make some modifications like raising the lip on the nests, more ventilation up high, or raising the roosts some but that is all doable. I would build a predator proof run so I could leave the pop door open at all times, that’s the enlarging I’d do. I’m not a huge fan of the premade coops, that one is not that well designed for chickens, but it will probably suit you. Good luck!