There are a few defensive things I do want to build though...
1) A Hidden Bunker - at first, I was pretty resigned to die if we are nuked, but really, it's quite survivable where we are. Same with a nuclear incident, and fallout or even an impact event that doesn't kill us all outright. Seems the first 48 hours are the most dangerous for radiation, and then the rest of a two-week period if your area actually gets a big dose of it. In addition, this could serve as a redoubt area if we are overrun, to take back the place. Basically, the plan would be to dig down, build the bunker with poured concrete, cinder blocks, and rebar, and hide the area that does stick above ground (I've got a good idea on this one...basically, something that most will never go near). It won't be built for comfort, but will be livable for 48 hours to two weeks if the worst happens (concrete and earth are great for blocking radiation). - this project will probably be a while, as I'm still working on the final design, and it will be expensive, and with almost ZERO immediate benefit, which knocks it down on the priority list. I'll likely barter for the materials though, so it may just be a project of opportunity. Something I discovered while designing, you only need beds for 1/3 of the occupants, as if you use shifts, only a third will be sleeping at one time. Greatly reduces needed space.
2) Pillbox Planters - basically, these are cinder block pillboxes (painted decoratively) at strategic points with good fields of fire and observation for sentries. However, prior to a SHTF event, they'd be filled up with dirt, and plants. Come a SHTF event, the plants are dug out, and a roof panel bolted on top, but until then, they are just landscaping. - this project will be done middle of next year, I'm constantly collecting cinder blocks, and already have the rebar and concrete for it. Another pillbox will be the grill area, though it will just look like an area for the grill, vs. defense.
3) Vehicle Stoppers - about 3' in front of the perimeter fencing, I want to sink 6" diameter posts (4' long, so 2' below ground and with concrete, 2' above ground) every 3' to prevent vehicles from rolling through the fencing. Has a practical use now, just in case someone careens off the road, etc., like convenience stores use. Most of the property already has trees that fulfill this role, but there are open spots where this would be good. - this project will be done end of next year hopefully (and we have to have a locator company come out just to be sure we don't disrupt any roadside utilities.)