First thing to ask would probably be, apart from working in a sugar mill ,what are your current job skills or what type of work are you looking for. To some extent this may define location. Mystic and Shane V would probably have a better idea whats available in their area but here on the coast there is never any problem following seasonal work, not highly paid but its still work.
For instance right now, I could get you a job on a friends farm, harvesting potatoes or driving the truck to the processor if you have the necessary licence. A number of farm contractors are always looking for genuine, serious team members for planting and harvesting crews as they really need to employ people they can rely on. Not easy work or great hours and the weather can be a trial for some. Thermals, water proof boots and wet weather gear required. But it will put bread on the table. Norton Harvesters I think are often looking for drivers but that can also take you Interstate for a few months at a time.
Of course there are many other opportunities and types of work. I guess it comes down to how serious you really are about finding a job and what you are prepared to do.
Eastern Tasmania is livable but is regarded as the holiday coast, there could be work available in the hospitality industry, you may find you would do a fair bit of traveling, unless you can dispose of a local and snaffle his/her job, but once again seasonal work would be readily available. One aspect for a lot of mainlanders is that it does tend to be the warmer and drier side of Tassie and I mean dry. You probably would not find much in the way of cheap land and if you did I'd probably be asking why.
If you still have that Kwaka Ninja as your nick indicates well your just gonna want to ride all day and forget the work anyway.
As for building materials, depends on what your after and how you want it to look. A mansion or a shack, although there are some pretty shmick looking shacks in Tassie these days. Steel framing and colourbond have become very popular as building material it often works out well below the cost of using timber and some of the timber I see being used to build houses these days is of dubious quality and highly priced but as a builder told me, once its covered up nobody see's it.
Be aware the building regulations and requirements these days have gone stupid with all sorts of expectations for lighting, heating, insulation, septic and grey water systems if you are unable to hook into the town supply. It can sometimes work out cheaper in the long term to buy than to build if you can find the right place as we did, but it took us 3 months to do it
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You could always stay in an on-site van in a caravan park for awhile here and there before deciding on a location if your not sure, but it would get a bit pricey after awhile. But with winter coming on you might be able to negotiate a short term arrangement.
Or maybe a small campervan might be an idea, then you could be self sufficient, go anywhere and try out different places, plus its handy for seasonal work as many places provide a camping area for workers, cutting down the need to travel to work every day
If you still have the bike and you bring it over, you can always park it in the shed next to mine, if you need to leave it somewhere secure for awhile. If youvé sold it, your gonna wish you hadn't.
Hope the diatribe has been of some help. Apart from that, the final decision will always rest with you.