I do live fulltime in an RV (school bus conversion... they are never finished). Been fulltiming (for the second time) since early fall 2006. This is what I have found in our/my case...
-- You need to be debt free.
-- You need to have a plan for when various things go wrong (David died and I have found you need to pay CASH up front for a funeral/cremation). Get a legal will, etc for your DOMAIN state (the one you will have everything registered in and you can only have one state)
-- Do not get rid of ALL your credit cards. Hang on to one or two and use them occasionally then PAY THEM OFF. Use them for purchases that you have the money for. Credit reporting bureaus are several years behind on my addresses. I used to say NO credit cards. I have found that they do come in handy but only if you use them like a debit card. I figure one use per month should flesh back out my "thin" credit file.
-- Get a mail forwarding outfit now. Get your mail transferred over months before you need to as it will give you time to get used to it.
-- Get your banking set up for online while you still have a stix-n-brix address. Banks are weird. I use a Wal-Mart Moneycard VISA Debit (paycheck is direct deposited) and I also have a Schwab checking/brokerage account. I have an employee stock purchase plan where I work and it pays better than a savings account. 10% of my paycheck get pulled out and twice a year stocks are bought. Then I can sell them a little later and make a few $$ (last buy/sell got me $106 over a 6mo time frame). The money is then put in the Schwab account. PAY ATTENTION to your banks travel policy. Schwab requires that I notify them, BOA kept putting locks on our debit cards because we were using them in different states on the same day.
-- Build up your business now, not while you are on the road. It will keep you from being overwhelmed by having to adjust to so many changes at one time.
-- Once you get your RV, take it on a few short "close-to-home" trips to work out any bugs it may have. Then I strongly suggest that you move it to a nearby RV park and live in it for a few months to get an idea of what changes you will need to make to it WHILE operating your
business out of it. Meanwhile you can be cleaning out your house, storing what you may think you want to keep, putting it on the market.
-- If you are selling and using Paypal, get the debit card so that you can access your Paypal $$ without having to wait for a transfer to your bank account.
-- Get a fire/waterproof safe to carry your important papers with you (you will need a copy of your legal government issued birth certificate and marriage license). If you don't have one already, you may want to consider getting a passport. Even if you do not plan on leaving the US, it would be helpful. I have run into several situations where having one would have meant I did not need an inch thick stack of papers to prove I am who I am. I'm not sure if it is the patriot act or the mind numbingly idiotic NM government workers.
-- Put your vehicles in BOTH of your names.
Most folks opt for a no income tax state (FL, SD, TN, TX). I suggest that you chose a state that you will be passing thru or be close enough to visit in case they demand you show up (TN said I had to renew my driver's license in person... 2-3 days notice would not allow me to travel from NM to TN, nor did I have the funds to do it... so much for "you can renew your driver's license online").
My next state will be FL. I do work fulltime in a regular retail job (Home Depot). Trying to get an online selling thing going but with a recent death, I have a hard time just getting thru the day and getting the bus ready to leave this terrible state (I blame NM for David's death, irrational I know, but I am very irrational right now). For me, I just want to go "home" (east of the Mississippi and south of the Mason-Dixon).
BTW, I get "cash back" when I use any of my debit cards rather than using an ATM machine... no fees.