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BAR[_2_]

In article , says...

On Thu, 06 Jun 2013 14:23:34 -0400, JustWaitAFrekinMinute
wrote:

Seriously Don... Get to craigs list and get a 6 hp rototiller... Remove
the blade and have sombody bolt or weld a ball on the thing... Just find
one for a couple hundred bucks that is self propelled and look up
anybody locally with a set of end wrenches and a welder, another 35
dollars and maybe even a case of beer and you are golden...

I was really thinking you could make something.
Use something like a garage door opener motor for power. They are
usually gear head with a pretty good reduction and they end up with a
sprocket chain drive. These show up at garage sales and on Craigs List
for $20 or less.
Put a big sprocket gear on the wheel drive to get a little more
mechanical advantage.
Then is just a question of fabricating the dolly.

Have you ever lookd at the spindle where the sprocket is installed. It looks like a bottle
cap, the sprocket, on a bottle. They use the smallest part of the spindle to mate with the
sprocket. Time, alignnment and general use can shear the sprocket off of the spindle.

With the lower cost garage door openers it is easier to buy a new head unit and attach it to
the existing rail and hangers.