Keep your CPR current! It's a requirement to be hired.
Yes, it's possible to make a living working casual. When I was a new grad, I worked casual at three different facilities to pay off my student loans in slightly over a year.
Job hunting? Make friends with the regular staff where ever you do your placements. They know who they'd like to work with in the future and who they don't want to see ever again! They talk to the managers. Make a good impression.
Be willing to work any and all shifts. The staffing office loves casuals who work evening, nights and weekends.
Don't turn your nose up at starting off in LTC. When I applied for an acute care job, the manager who hired me told me she loved to hire LPNs with LTC experience because they had their time management skill down pat and knew how to work.