A lot of roleplaying gamers who are used to playing in "theater of the mind" mode (with nothing more than pencil, paper, dice, and vivid imaginations) are often intimidated by the idea of switching over to miniatures and terrain-based gaming. The idea of acquiring and painting the minis, building a gaming board, and making a bunch of terrain and props can be an overwhelming prospect. All of this "dungeon crafting" really is a hobby unto itself for many of us [raises hand].
So, I really like these projects on Dungeon Craft. Basically, you build a stone floor on top of a lazy Susan using insulation foam and some simple walls, doors, and other dungeon furnishings (also out of foam). Your main tool is a gel pen that you use to simply draw/carve the stones into the foam.
You don't need to create a complete dungeons and all of the furnishings to do mini-based RPGs. All you need is this little, moveable theater-in-the-round stage that you can change up with each encounter you're looking to represent to your players.