Wall-E wrote:
...PhotoShop (Creative suite) costs as little as $10/month. (You can't buy the newest version, only rent it)...
My *personal* opinion, is that LightRoom does 90+% of what the majority of photographers want. Cropping, color balance, saturation, light editing, cataloging. And you can purchase LR5 for $150, and own it forever.
Or, if you DO need some of the layer based editing, then get PhotoShop Elements (current version is 12). Still has way more training resources than Gimp.
You have never "owned" software; you have always licensed it. The vendor retains all property and intellectual rights and merely "rents" it to you. What Adobe changed was instead of a one-time payment, you would pay them monthly. In exchange for that, they promise to give you improvements sooner than for conventionally licensed software and to eliminate that kind of software altogether. How nice of them.
The reality of the marketplace is that Adobe is the gold standard with the lion's share of the business. While other vendors offer innovative, easy-to-use, and cheaper products, they do not rival Adobe in the breadth, training resources, and overall quality.
As much as I like Photoshop Elements, I find Lightroom indispensable and its logical partner is Photoshop, not Elements. At $10 monthly, the LR/PS pairing is a better buy than buying LR and PSE separately.