Constructing an apartment building?

[Isaac R.]

I have been blessed in success with SFH LTR. I'm looking at expansion.

There's some land for sale in Columbia, but I don't know where to start on evaluating my options. So far, I've tried looking at: modular homes, mobile homes, RV park, or apartment building (would probably require rezoning). No callbacks, not really getting answers to my questions.

Where do I look to fix my ignorance?