Re: full timing from diffent country
Hi Brett,
First of all, full timing "forever" is not possible without a residency visa and good luck with getting one of those. You could follow Domingo's option and come in from the south. I believe that this has happened before on a couple of occasions. But be quick, before the fence is finished. The next best thing to enable you to spend a prolonged period touring (as we did) is to apply for a B1/B2 visa from the USA Consulate in Australia. Takes a little while and there is a cost ($250 each from memory) and you have to prove that you have the cash back up for the trip plus reasons to come back. ie own a house etc. Once you have that you would be permitted to spend up to 6 months at a time touring in the country. After 6 months you have to leave the country, and the continent, before returning. Mexico and Canada do not count. Then you can return for another 6 months. You only have to leave for a short time. We went to the UK to visit relatives. Re-entry is not an absolute right, it is still dependent on approval at your point of entry. Insurance is an issue without a USA address but not impossible. There was a post on this site recently which directs you to a couple from the UK that did it all and would be very helpful. Have a search through past topics and you should find it.
Let us know if you need any more tips.
Keith