Congratulations on getting planning permission. Please keep us posted as to how you get on.
The manufactures recommend that the systems are checked and oiled at least every second year. I know people though who have never had their turbines serviced and have had them up for years without problems.
The turbine components are small enough to be really mobile. My site was very narrow in part with the turbine having to be brought round the side of my house where the clearance was down to 350cm.
The turbine sections were dragged by a mini digger and three guys. It all worked fine though bar a few scraps to the paint work (make sure they have top up paint) And we installed our 6kw Proven on a 15m mast over 100m from the nearest point reachable by a vehicle.
The biggest land restriction with a tilt up tower is that the turbine has to be assembled on the ground, so you must have a plot of land that is flat and free from obstructions and at least as tall as the turbine and tower 18m in this case. You also have to have the anchor point in the same line so this adds another 10m so you need a run of 30m for the tilt up. I will post up more of the pictures of my site and the turbine assembly on the blog section of this site as they may be useful.
Good luck again!