Cool design! I'd recommend having the excavator(or your homies) do all of the digging and swale making for you. A good operator will take your instructions(though they are not always versed in permaculture design methods), and can move more soil in one bucket than 5 people can move in an hour. And s/he can do it all day! IMO, that is where a lot of your costs are...in labor, and that is where your money is best spent. However, given the size of your plot, my next recommendation is homies over excavator.
2nd, set up a permaculture blitz, where folks from the neighborhood and friends all come in at one time and perform a single task, or a bunch of easily achievable tasks, all in one day. You make friends and bang out the work in no time.
Good plants can be expensive. If you are willing to wait, get smaller plants on forums of plant enthusiasts. Plant trees as bare root, in the late fall/early winter. They'll be cheaper, healthier and not pot-bound. One resource I highly recommend is Mike McGroarty, a neat guy from Ohio that has tons of youtube vids up about getting your own plants via cuttings. Find plants you like, identify them, take cuttings, root them in sand under a mist system on a timer, and literally save thousands of $$. In Texas those plants will grow very quickly.
Start small if you are worried about costs. As they say, water, access, and structures come first, then cover crops so that weeds do not take over...especially if your progress will be slow...a good cover crop for your area would be something that establishes quickly, beats out the weeds, yet is easy to dig up or incorporate as yuo fill spaces with edible/fiber crops or trees. To start you off...get yourself some goji plants! They will do great in Texas.
Fence price seems crazy...THAT is a great DIY project. Low material costs and you and your buddies can bang it out in a weekend.
Beehive nucs and hive boxes can be expensive to set up. Maybe local bee enthusiasts could help point you to cheaper options to get started.
Keep us posted on your progress!
-fixie