Hi Mike, Interactive map building is something I have very little experience with - I haven't ventured much beyond embedding google maps in iframes such as yourself. I would suggest browsing the app market and 3rd party plugins available on builders like Wix and Weebly, who both offer a huge amount of additional features. It would surprise me if there wasn't a plugin that could help get you on your way. Similarly, you can also find membership area functionality through these app markets. I believe Wix also offers the ability to add member areas and logins though its editor too. Hope that points you in the right direction, - Tom
Obviously, your website will need extensions to connect with your social media accounts, add voting plugin, save user account details, and more. For all that you will need a platform that can be extended to meet your needs, and WordPress makes all this super easy. You may also be able to find free plugins to do a lot of things which will help you keep the costs in check.
Templates provide a framework for your website — a coherent, attractive canvas for you to paint the content of your site onto. They’re how you can have a site that looks good without having to hire a designer. Templates dictate color scheme, what your homepage header and menu bar look like, and the content width on your site, so it’s essential to pick the right one.