Flock cams don't even need a power connection because they run on solar+battery, and wireless data connection. You can put one practically everywhere without any preparation - even the post it sits on is pretty optional, could use cable binders to hang them on a tree.

Data centers often get built where land is cheap, and at least in the US there is a (horrifying and stupid) trend to design them to run off-grid with gas turbines, so you don't even need utilities there, just data connections that you can run underground.

Trains take up a lot of space, and if you want them to be useful, they need to be where the population density is high enough. That means high cost for land, often buying up big amounts of smaller lots where you have to work something out with a multitude of land owners who might not want to part with their - often prime location, because it's in the city - land. A single land owner not selling their land can grind a project like this to a halt, at least if there is hesitancy using eminent domain, which is a crowbar approach and leads to resistance to your project.

Don't get me wrong, i really think the USA would benefit greatly from modernizing and expanding their rail network! But realistically, refitting a train line into a city center where you preferably want the station to be is a hard task, doubly hard if you want to actually pass through the city because its not the head end of the line - it doubles the land acquisition woes. A possibility would be going underground, but underground construction is an expensive endeavor, and the US would probably need to get outside expertise from Switzerland or Austria where we construct tunnels through mountains and below cities on the regular to make it work.