How much room on the property do you have to excavate a pond basin that is below the elevation of the spring entry point? That kind of sets the size of your potential pond.
Is the pond currently in clay, or do you have clay available in your nearby subsoils? That kind of sets part of the costs if you develop a larger pond.
Are you just considering a nature/decorative pond? In that case, you can add a few trout and any of your local forage species. (And there are probably many other fish options.)
What about the pond gives it the unsightly appearance? On a pond that size, you could easily shape the shoreline a little with just hand tools, put down some heavy landscape fabric and then cover the edges with any of various types of rounded river rock that are locally available and are attractive to your (or your wife's) eye.
Spring water is typically fairly low in oxygen. Can you easily run 120V AC from the house or shed? A little submersible pump could be used to create a mini-creek or waterfall above the pond. (Just use pond liner to avoid water losses.) That would aerate the water a little, especially if tumbled over rock features, etc.
What are your main goals?
Just throwing out some ideas. If you add some goals to your post, there are many creative members that have designed or helped on lots of different types of ponds. I think there was even a new Utah guy that was on earlier this year with a small pond. (But I don't remember any key terms to help you search for that thread.)
Congrats on your new place and new (old) pond!
