You don't need to buy a new camera or a new lens, I am sure your camera, if it's a Pentax DSLR, has features you aren't even aware of, and you have never used.
I know that is true in my case. I'll give you and example, using my K-5's multiple exposure mode
Technically, there are many things wrong with this picture, but the point was not to make a perfect picture, it was to try something new with the gear I already own, in my backyard. Everything was done in-camera, too.
Inspiration, at no additional cost. As soon as the rain stops, I hope to try this idea again, and achieve a better result. That is another source of inspiration. Look through your old images, from the time you first started photography. Think of how you might recreate that image today since you have more experience.