I assume that the trailer will be heavily loaded? You are spending a great deal of money on a product that you seem to know little about. That seems a bit risky to me, as you could get lucky and have all solid quality equipment, or you may buy some junk. If you have not done so, I suggest that you start now to learn about RVs and who makes quality ones as well as how you go about judging it. You would be wise to join the RV Consumer group (www.rv.org) and study the materials that they supply.
Then there is also the risk of finding that you don't like RV life, as some people do discover. You may love this life as most of us do, but there are no guarantees. I think you would be wise to rent one first just as a small test. Then there is support services in Mexico and Central America. Parts can be hard to find and so can some services.
The combination that you are speaking of will be very heavy and expensive, as well as needing significant maintenance and care along the way. My main advice is that you need to go very slowly and learn as much as you can before you start to buy equipment.