Homesteaders of previous centuries settled near creeks when possible. This served three purposes: drinking water, cleaning and refrigeration. Refrigeration is achieved by building a spring house next to the creek and diverting water through it. The cold water keeps submersed items cold.
You know you have moles if you find large holes or tunnels just under the surface of the ground. You have three solutions to choose from: killing them, moving them via trap or repelling them. Repelling moles is the cheapest method and can be accomplished without using commercial products or methods.
You have reasons to believe that an extra person living with you to help pay the bills may be a good thing. If you allow someone to move in, do you understand the implications and legal considerations? Does someone living in your house paying some bills make them a renter? What are the implications?