The kitchen layout and stainless appliances are nice at least. Since you don't have the budget for an open concept, there are a few suggestions I have.

Paint. It's a DIY project that will make the kitchen and living space seem bigger if all done in one color. My suggestion would be Revere Pewter by Benjamin Moore. Make the space a little brighter.

Nook. If you could remove the round kitchen table and install a breakfast nook, that could create more space for you to work with.

Reface the cabinetry. There is no need to replace the cabinetry you have since the layout seems to work perfectly. I'd reface the cabinets with an antique white door. It will give you the look of a new kitchen, learn more here- http://www.granitetransformations.com/southjersey/cabinet-refacing-page/

Hope this helps!