I think taking the classes in person has its benefits, the social networking being one of them. Some of the course participants taking a live class will already be working in the business, even if they're not yet actually appraising. Plus, it's all abstracts to a noob until they can start connecting the application with an example, and online courses in particular are notorious for using unrealistic and obviously made-for-instruction examples in their materials. You'll still get some of that in a live course but a live instructor and other course participants will also be able to provide some of their own IRL examples that aren't contrived.
I'm not a member of the AI but I've spent a lot of time teaching live courses and one thing I can tell you as an instructor is that if the group doesn't get the example in the book (or as presented in an online course) a live instructor can work around that by finding other ways to explain it. I never hesitated to approach an explanation from multiple angles or breaking down someone else's war story into its fundamentals in order to illustrate that application.
I've written courses for online instruction, too; so I can tell you for a fact that an online course *cannot* adapt on the fly or indulge in multiple approaches for the same topic. Course participants are at the mercy of the course developer's ability to articulate the material on the one-size-fits-all basis.
Getting the instruction and passing the test is the easy part. Getting the job is the hard part. ANYTHING you can do to expand your network in this business has the potential to pay off. Not to mention the added value of being able to cite the live instruction with those instructors - who will have a professional reputation of their own with their peers. You will spend a lot more time and money taking these courses live, but having those references (I took one course in Boston, two in Chicago and one in Pheonix) will demonstrate to prospective employers your commitment to do or die.
My advice is to take the courses live, get actively involved in establishing and pumping your networking opportunities. Don't just show up and blend into the background but don't cross the line from trying to join the team into being a complete parasite, either. Attend the local chapter meetings, volunteer for the cookie/punch detail and establish your own reputation for taking notes, paying attention and being a collaborator and team member.