One thing to keep in mind about buying Lightroom outright… You will have to pay for any future updates, for example, when Lightroom 7 comes out, you’ll have to pay something like $100 to upgrade to it. With the CC subscription, you’ll get all updates instantly, for the $10 a month fee.
RE: what happens to my photos after I end the subscription? See this blog post by Adobe: https://blogs.adobe.com/lightroomjournal/2014/07/what-happens-to-lightroom-after-my-membership-ends.html
Basically you’ll be able to see and “manage” your RAW photos, but you won’t be able to edit them using the Develop Module till you renew your subscription.
I personally purchased Lightroom 5, and have been very happy with it, I much prefer paying outright for software than to have someone draining my account every month. 🙂 Eventually though, in a few years you’ll be forced to upgrade to a newer version if you buy a new camera, and want to be able to edit your RAW files. (Unless it shoots .DNG files, or you convert them to DNG before editing in LR.)