I think Cordelli has a point about selling the house.
A more practical idea might be to find a trustworthy roomate. That way you keep your house and have a permanent address (and tax write off) and a place to retreat to if needed. Get someone who understands your lifestyle and is willing to act as a go-to person for your house, mail, etc.
75% travel is done by many people. It can get exhausting after a time. If the money is good and you enjoy it then I say do it. But always remember that if anything happens (laid off, medical problems, relationship issues) you need to think about having a place to call your own.