Low cost electric tow tug for our Cessna T-41B built at home in my garage cost under $500. This is a significant savings compared to the $1750 to over $2000 range for a pre-made tug.
Works great to move our heavy T-41 210 horsepower R172E. Easy to control, runs on 2 12V batteries with built in charger. Our hangar has a slope to put the airplane in and this jewel does the trick with power to spare.
I am thinking about developing a set of plans if there is enough interest. It will be quite a lot of effort to come up with quality plans. Let us know if you have any interest.
We painted it to match our military version T-41B but it can be easily painted to match your airplane. If you have the time and ability it is a great savings compared to purchasing a factory built tug.