rear rack

If somebody designs a safe way for TT & FW owners to haul golf carts they could be a rich person.

They have. It's called a toy hauler.

Putting large amounts of weight on the back of a TT is a really bad idea. Really bad. Been there and done that.

Don't.

If somebody designs a safe way for TT & FW owners to haul golf carts they could be a rich person.

It will take you to the scene of the accident the first time you get to 45mph. Many years ago I put 300lbs of bargains in the back of a single axle Airstream... at 45 mph it got very interesting... I've never made that mistake again.

Thank you every body, you confirm my own thoughts on adding anything to the end, Ed

Carrying a golf car on the back of a TT would be insane and far exceed the TT frame capacity. May you mean a rack from a golf car retrofitted to the TT?

Way too much weight on the back. The front end will be unloaded leading to some potential sway issues.
Also, the back end just isn't that strong and a lot of steel would have to be added and even then, it would be questionable.
If you really want to do this, a toy hauler is the way to go.

I read the question 3 times....are you attempting to carry a golf cart somehow on the rear of a travel trailer?

If so, I don't think it's a a very good idea.

Do you mean a rack to hold a golf cart?
You would have to have an extremely strong frame for that.
That's what toy haulers are for.