It's just part of the game. Just like faking injuries in soccer, staying overnight in a parking lot is just a part of the game. More specifically its just a part of full time RV living. RVers always need a place to hang their hats for a night while in transit.
Extra income is important while traveling full time. You never know what will happen because life is always full of surprises. It took my wife and I a while to start thinking outside of the box. The normal 9-5 job was not going to be an option for us because we knew that we wanted to travel the majority of the year.