tug.
Riding mowers & 4-wheelers are great for pulling just about any GA plane.
But when it comes to pushing it turns into the "backing a hay wagon" problem. Its not to hard to push a plane if its already lined up well and its a short distance. But getting it lined up that good means you probably had to pushing it by hand to get it there. Tip: Look at the tail of the plane when pushing with a tractor/4-wheeler. It is so easy to get crossed up. And with old riding mowers on concrete they can be hard to steer on the pavement when moving slow to turn.
If you think you are going to push it with a riding mower over hundreds of feet and around corners...good luck its a skill that farmers struggle to master.
This is based on using a old JD277aws. I put a 2" on ball on the front and the back. Gave up on using the front (push). I bought a used gas powered tug. Literally 99% easier to push than a 4 wheel tractor or 4-wheeler.
However....
Now that we've moved to our owned hangar which isn't a T-hangar I can pull it in nose first
So now I use the tractor to do that. Since there is slight slope going out I can push it out by hand. Plus we have snow and ice. The chains on the lawn tractor let me pull it across anything but glare ice. So big vote for lawn tractor or 4-wheeler if you can pull it all the way in. I've been experimenting with pulling the plane in tail first by the tail tiedown. If you park the plane nice and straight when shutting down this works. If there is a lot of angle on the nose wheel it needs to be straightened out. If I could get about 100lbs of down force on the tail tiedown I think I could pull it without futzing with the nose wheel alignment.
...For Winter People....
If you are on a lot of ice - see
@WannFly's comments. Our old gas powered tug sucks on ice. And I don't think I could get a enough force on it - with chains - and with all my weight - to move a fully fueled 182.
The other place a tractor/4-wheeler is great is avoiding cold starts on the plane to fuel up, move it to wash it etc. These tend to be much longer distances that might be more than you want to do with a small powered tug.
When I ditched the front (push) hitch option I put an old snow blade on it. I have used that more times than I can count. Was just using yesterday to clear the pile that the snowplow driver left up against the door. The blade is great and I can lay a ton of weight on it and really scrape the snow down so that it just melts off the blacktop the next day. I haven't found a way to get a snow blower to scrape it that clean.