I have one point of critique though: There's a spelling error in the logo (most prominently visible in the box-art). Unless you misspelled the protagonist's name wrong everywhere else (which seems unlikely), I don't think it should be 'Jericheo'.
Sorry for ignoring the DirectX11 requirement for now, but why would you want to pay for an engine?
There's plenty of freely available engines/game-kits available (Unity, Unreal) that will allow you to do anything you can think of, if you have the creativity in you (that you would need even if you pay for an engine).
I suggest you give it a try with one of those free engines first, before paying a lot of money and get disappointed soon.
Do you have experience in game making? (you say you're retired, but not what from..)