It's probably because it's far to technical a question for most Realtors, and far to inconsequential to coder types (you're focus should not be on micromanaging the details, you will never finish your project if you get hung up on the very first line of your source)

I think you need to ask yourself Ted - is this something you should really be doing? (Your website is the main source of your leads for your real estate business and you are a professional Realtor, not web developer right?) - what's going to happen when you realize that in order to bring your site up to today's standards you are going to want built in custom IDX (which means dedicated server, major data parsing and sql integrations, crazy queries, crons and creative solutions to complex programming problems) etc -

Also - when you finally do learn how to implement today's progressive code - (and how knowing the basics does not allow you to do anything close to what you see other professional firms) how much of your time (and more importantly opportunity revenues) have you wasted in realizing a few weeks / months and $10-50k later you would have been way further ahead - know what I mean?

This is a driving piece of your business - don't let your personal interest in learning code, or considerations of cost be your reason for upgrading yourself - let ROI be your guide - the right answer will come to you
Cheers

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