toad and fresh water

Could any two subjects be further apart? Doubt it.

I'm considering getting a toad. Have no clue what to look for when shopping.

I don't know if it is better to tow on a trailer; pull on all four tires; or, put it on a dolly. Suppose each has both benefits and problems. Is a manual tranny better than an automatic or vise-versa?

Now to the fresh water question.

My owner's manual said for me to put the antifreeze directly into the fresh water tank and pump through the system from there when winterizing. Now anti freeze is poison so how do we go about getting it completely out of the fresh water tank? Will a couple of rinsing with bleach do the trick? Or, have we screwed up completely?

Thanks for the help with both topics.