Is the 30-40k your vehicle budget? Your travel budget? Or both? How long do you want to stay on the road? Sounds like indefinitely? If so, whats your income look like? I know for some these are highly personal details, but good responses to your query require it.
As far as rough costs, for one person, 50$ a day is doable in most of the developed world. That will cover fuel, food, motor insurance, incidentals, and some leisure. You will not be able to pay for lodging all the time, that eats money very quickly. Of course thats what a good camper is for. For two people 75$ a day is living pretty well. Assuming you mostly free/cheap camp. Remember that is saving ZERO for retirement, and minimal or no health insurance. Those figures also do not include depreciation/wear on your vehicle (home). They also do not include shipping a vehicle via ocean freight, or carnets.
Building your own camper is a HUGE time consumer. Especially if you want something comfortable and reliable for full time travel across the seasons (world). It can take 1,000 hours easily. Unless you have lots of experience with the various types of work this involves, or you have lots of time to burn, I suggest finding something pre-built that meets most of your basic needs. Then refurbish/modify it to suit your travel style.
Nothing on the market is going to be truly designed for full time overlanding (except some expensive niche vehicles). Even then its not going to meet your exact specs. Having built a number of complex projects from the ground up over the years, I can say its 50% less work to start with something, anything really, as a base. Most of the time eating design stuff (most of which no one ever thinks about normally) is done for you.
My final question. Do you need a truck or something with 4x4? Cause a motorcycle on a carrier gets you pretty darn far. If you eliminate the 4x4, you can choose one of many well built RV type vehicles. Modify for your usage as needed. These will have 30% more usable space, and be cheaper to operate and buy. For example a box on a cab-chassis, van or cabover, is very roomy with a good layout. Still parks in a regular spot, and can be turned around on a single lane road with patience.
Most of our travels are on our blog (signature below).
Th Aus porition is also posted here.
Hey folks. At the end of last year, we complete a 11 month adventure in Australia. We kept a blog of our travels, and it is my plan to recount it here over the next few weeks. Some background. We got introduced to overland traveling after working for an airline. Ironic isn't it? We could...
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I am slowly posting the NZ part here.
Back in 2017 and 2018 we shipped our Van to Australia and then New Zealand. The first part is written up in the thread below. https://www.expeditionportal.com/forum/threads/exploring-australia-from-the-left.193389/ The second part, our New Zealand travels has not been posted here. Over the...
expeditionportal.com