Concerning Mineral Hill I don't know anything about plant values...

Concerning Mineral Hill I don't know anything about plant values but I think that the ore body is worth nothing. Market is right on that.
We are lucky if they don't spend much more over these 5 years than they expect to earn.
They could just be lucky and still find some "Missing Link" super cool new pit, but all the former owners didn't, so this is not likely.

Mineral Hill was not only in production until 2016, they already mined there back in the 90's it seems:

"Production history Triako’s Mineral Hill underground gold copper mine is located 65 kilometres north of Condobolin in the centre of NSW. After two short periods of production (1989 – 1990 and 1993 – 1994), the mine resumed production in 1995.On resumption of production in March 1995 the ore reserves contained 10,000 ozs of gold and were sufficient for 14 months production at the rated treatment plant capacity (i.e. to June 1996). The reality has been 7½ years (90 months) of production yielding 214,000 ounces of gold (figure 1) and a cumulative operating cash surplus of $41.7 million (before capital and exploration costs). Of this surplus 56% was generated in the last two years. Moreover there are another 199,000 ozs of gold in resources including 108,000 ozs of gold in reserves. ..." https://smedg.org.au/old_site/shadcollinsab.htm

So this mine had several owners and was closed several times because all of the former owners could not find any more profitalble ore. Why should kingston find what all the former owners couldn't. I don't have much hope for that. Also very sad.