Need an online calculator for garden fountain and water cascade installation cost

I want to add a decorative water feature to my backyard but every contractor gives me a different number, so I need a tool that puts some logic behind the estimate. The calculator should let me pick between a simple bubbling fountain, a multi-tier cascade, or a pond-and-waterfall combination, and then adjust the price based on the footprint I enter — small patio corner versus a full garden centerpiece. It also needs to account for depth, because a shallow decorative basin is a completely different job from a feature with a proper reservoir and filtration chamber.

Beyond the shell of the fountain, the real cost driver is usually the equipment and finishing. I need fields for pump type and flow rate (submersible versus external, low-flow versus high-volume for a waterfall effect), plumbing length and whether a skimmer or UV clarifier is included, plus lighting if I want it lit at night. Finishing materials matter too — natural stone cladding, tile, pebble beds, or poured concrete all carry different labor and material costs, and I'd like the calculator to show that breakdown rather than just a lump sum.

Finally I need the tool to cover site work: excavation, leveling, electrical run to the pump, and waterproofing the basin liner, since those are often left out of rough quotes and then show up as surprise add-ons. A short results summary with a total range and a rough timeline for the installation would help me plan the rest of my landscaping around it.

— Fountain type selector: bubbling, tiered cascade, pond-and-waterfall
— Size/footprint and basin depth inputs
— Pump type, flow rate and plumbing length fields
— Optional lighting, skimmer and UV clarifier add-ons
— Finish material choice: stone, tile, pebble, concrete
— Site prep costs: excavation, leveling, electrical, waterproofing
— Clear total cost range plus estimated installation timeline