Cabonne, Oberon and Walcha Councils are taking actionto challenge the legality of the provisions used by the NSW Government in its Cabonne, Orange and Blayney merger proposal.

Cabonne Council has kept open its options to lodge an appeal and seek an injunction to prevent the proclamation of a merger with Orange and Blayney Councils should its legal challenge this week be unsuccessful.

A spokesperson for Cabonne said '' At an extraordinary meeting on Monday, Cabonne councillors voted to lodge a notice of intention to appeal against any adverse judgment and seek an injunction preventing Local Government Minister Paul Toole recommending that a proclamation be made, pending consideration by the council of the results of the case.''

In doing so, the council voted to spend up to $20,000 on the legal expenses involved in lodging an intention to appeal. Councillors were told the full cost of proceeding with an appeal could be about $150,000.

General Manager Andrew Hopkins said it was unknown whether other councils involved in the case would participate in that process.

He said advice from Cabonne's lawyers indicated it could take eight to 10 months before an appeal could be heard in the NSW Court of Appeal.

Earlier in the meeting, the council voted to provide a further $30,000 for legal costs for this week's case. This amount is in addition to the $20,000 council originally resolved to spend.

If the case goes the way of the bush councils some say the merger between Wellington and Dubbo may come into serious question.

Meanwhile mke Calare marginal or it won't matter was the message the Nick Xenophon Team said on Monday as they met with Charles Sturt University (CSU) representatives to add their backing to the Murray Darling Medical School.

After a funding announcement for a medical school in Gosford last week left CSU confused and disappointed, Senator Nick Xenophon said The Nationals had failed to act on their pledge of support.

"This was a commitment given by the Coalition and by the Nationals, an actual commitment, at the last election, and it seems that because this is a safe seat it doesn't matter," he said.

"It's just breathtaking that they can find money when they want to."

NXT Calare candidate Rod Bloomfield described the decision to fund a medical school in Gosford as a slap in the face to Calare and CSU.

"There's no doubt we're missing out because we're not a marginal seat, we don't count in Canberra because Calare is not a tight contest, we need to make it a tight contest, it's as simple as that," he said.

"Even issues like this that are considered to be a no-brainer, you still have to yell about it otherwise you simply don't get the type of attention you need to make it happen."

Medical school executive director Mark Burdack described his dismay as the school faced another election without funding, but said while there was also an issue with the number of rural training places once students graduated, the big issue was the lack of interest in practising in regional areas.

"Unless we can get more students who are interested in rural practice, we're not going to get more doctors into regional areas," he said.

"The evidence is absolutely clear that if you train students in a rural area they are significantly more likely to work in a rural area."

CSU vice-chancellor Professor Andrew Vann said he had also spoken to Nationals candidate Andrew Gee and expected his support.

"We're calling on all candidates to support the bid," he said.