I had to run sewer and water 260' and tie in under my front step....it came in at a mere 22,000......I bought a gold cart with snow tires.....
I looked into an incinerator toilet but the are 4,000!  I am envious of your set up!  Well done..... 
i think the golf cart was a good choice 😎

working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.