I used poles from Kelty. Got them at REI, 2 poles for around 50$. Keep the height at about 4-5 ft. To tall increases flexing in the pole. The tieout...
Agreed with Shug that getting a hammock to test out first is the thing to do. In general, you don't need to detail it too much, it'll either work ok...
If you go with Hennessy, bought from Hennessy, I suggest upgrading the standard tarp - like the one that comes with the Explorer - to their Hex tarp....