Originally Posted by RV Vagabond
If you get a Montana drivers license then you should be fine. Spend a month in a Montana RV park soon after buying the RV and transfer your license while there. They will want to see your rent receipt.
OUCH!!!! It isn't that easy by any stretch of the imagination. Are you still going to be a "resident" of a given state? In other words, are you going to full-time in your RV? If you are going to be full timing then your path to the Montana LLC will be easier than it is for those who are not full timing.
As has been stated here many, many times, find out the residency laws of your current state. See if you can comply with those residency laws and document your compliance. If you can do both then you may want to go for it. Be aware that you have the burden of proof that you are NOT a resident of your current state. Proving that can be time consuming and expensive.
Is it legal to use the Montana LLC? The answer is yes, but.... Complying with the residency laws of your state is key. Failure to do so can result in you paying not only the tax, but also a hefty penalty and interest. States need money and a perceived tax cheat is an ideal candidate. The state gets their money and they can make an example out of someone who thought they could "beat the system."