I've heard nothing about Metrolinx borrowing funds (their request for funding tools did not include it) which means we're looking at a pay as you go type thing. If Spring 2014 has revenue tools like sales tax in the budget, Metrolinx won't get actual money to spend until summer 2015.
Small shovel ready projects will get funding first, such as the Mississauga LRT and a start of GO electrification.
Yonge will get TBMs first. They'll have the objective to tender the line before the 2015 election with annual payments of $500M (1/4th Metrolinx's budget, another 1/4th goes to municipalities). Doing Yonge first makes cancelling the revenue tools much harder. Yonge may just be an underground train yard until the DRL opens but it will almost certainly get built first.
Hudak will have no issues cancelling the DRL. He would take a bit political hit cancelling Yonge so Yonge must go first or the entire Big Move will be at risk.