Promotion and relegation has become a hot topic in the local football community in recent weeks.

There have been calls for the creation of a national second division, or B-League, to give prospective clubs the chance to one day make the step up.

McKinna has experienced promotion and relegation as a player in Scotland, and has coached in the NSL, NPL and A-League.

But the Jets boss is unsure if there is enough money in the game to support it.

"I don't think the clubs can afford it," he told FourFourTwo.

"The clubs in the A-League struggle so how is a club in the second tier going to finance it? What's the budgets going to be? OK, if all that gets laid on the line and the teams up their hand and then they can afford it, then let's look at it.

"But what happens when they make from that second level, because obviously there's the TV deal is not like in the UK, you're not going to get a parachute payment like in the UK for going down.

"Is the budget going to be $2-$3 million dollars and then they get to the A-League and they have to find another $6 million, or whatever. There's a lot of questions.

"I agree with promotion and relegation - don't get me wrong. All over the world. I've done it, I've been relegated in Scotland. But, is that second level... and I'm not talking about the players, because obviously there's teams that will be hard to beat.

"They'll compete. Can the clubs afford that next step up? That's my big question."

McKinna believes promotion and relegation can work in the A-League in the future, but that the competition should focus on expansion at the moment.

I" think long-term yes, as the game grows, TV deals get bigger," he said.

"I can't see it in the next two or three years. In the next two or three years can I see two more A-League clubs coming in to make it 12? That's the next big thing. Where are the next two teams going to come from?"