Many car rental places won’t rent to you under 21, so that can matter. And some do even have higher minimum ages, too. You should not plan on sleeping in the car. You generally won’t find any place you can do that legally (or that you’ll even get away with it). However, if you want to save money, you should be using public transport like The Bus instead of a rental car anyway. My husband and I want to travel to Oahu, Hawaii (on a budget), some time in the next few months for about 7-10 days or so (some time between Oct and Jan but we are flexible). Does anyone know when is the best time to travel there? You’d need to find a cheap hotel. But again, how much that’s going to cost in 3 years is something no one knows nor can fully predict. If the economy comes crashing down, Hawaii could become a very very expensive place to visit – or maybe very very cheap if people living on the island are desperate. However, plane tickets usually aren’t sold more than a year out, and it’s entirely unpredictable what fuel prices, etc. will be in 3 years. Tickets could well be much more expensive then – or perhaps even less. Prices will also vary enormously by what time of year you travel, and even what day of the week and what time of day. Where would be the best place to find cheap flights? Would it be cheaper to buy air tickets separately and then find a hotel/condo/rental apartment to stay in or to buy a package that includes flight and hotel?