Clarification: It’s $100 per game. And they give it you back once your game earn $1000. https://store.steampowered.com/sub/163632
5 is the only one I haven’t played yet so cannot really make a comment there, but you can check the older ones like HD collection. It has the first three games.
By the way I didn’t mention earlier but Ys series with nightmare difficulty could be a nice action for you. They have a boss-rush mode where you only fight the bosses.
Depends on the game but I got mine on a black friday sale (4 years ago) for $500 and I had no problems with Battlefield V, Death Stranding, Deathloop, Mount & Blade Bannerlord etc. Even without a discount $1000 is a nice budget for a decent PC (Not including the monitor since mini PCs also don’t come with a monitor). If you catch discounts you can even build a great one.
My banking app pulled the plug. They messaged me saying “you have a modified operating system”. It seems they can understand that without G-apps installed.