After finally getting myself to go about it, I dug up a spare tank that I used to keep freshwater shrimps in.
Bought $15 worth of distilled water today, topped up the tank and added Oceanic salt. Used a hang-on filter with some biohome from my other tanks. I aim to add another hang-on filter for more flow and filtration.
Will not be using a skimmer. Nitrate & phosphate control will be via biohome, NP-biopellets, water change and daily siphoning of detritus.
So far with the lights on for about 5 hours and the filter running, the water has not exceeded 26 degrees celcius. I am blessed to have the tank in an area with lots of breeze.
Now just need to get some nice branching Tonga liverock. Intended livestock I am thinking of is a pair of grissengeri gobies, and 2 Urocaridella shrimps. Coral wise I am aiming towards SPS, probably the slower growing species. I will need to figure out how I am going to maintain the Ca and kH values in such a small tank. I am aiming for bi-weekly water changes to settle this.
If the water flow from the additional hang-on filter does not seem to be sufficient, I may consider a Vortech MP10 as a normal powerhead in the tank will heat up the water. I will be hunting for a hang-on filter which can be modified to connect to a surface skimmer to remove oil film from the water surface.
Finally some pictures.