Actually, the bulb is only $100 and it doesn't need a service call to replace. A bulb should last you AT LEAST 2 years, maybe 3~4 depending on how you use it and it's very easy for the average person to replace the bulb. Manual of TV shows how to do this as well.
Still, DLP being big and cheap is definitely true. Moving parts be damned.
IMHO, I think the only major problem with REAR PROJECTION DLP
is Geometry, especially if you plan to use it with a PC.
Geometry is correctable to an extent, but you can't ever get 100% perfect geometry with a REAR PROJECTION DLP
.. at least, I've never seen it. It doesn't seem to bother during movies or TV shows, but if you've got a warped ticker or line of text on the screen, it can be one of those annoying things.
In my opinion, a $100 bulb shouldn't stop you from buying a DLP TV. Also, you can get a 3~5 year warranty through SquareTrade, to replace those moving parts. The warranty is pretty cheap but only obtainable if your TV is currently under the original manufacturer's warranty.
EDIT: Also, I'm actually in the market for a new large screen TV and I'm heavily considering DLP. I just got rid of my 55" Sony NX720 and looking at either a Panasonic TCP60UT50 Plasma or a 65"-73" Mitsubishi DLP.
I'm a gamer and the NX720's motion handling wasn't decent enough for me. Of course it looked good if you turned on ClearMotion, but that introduced all sorts of input lag. DLP does not have a motion or input lag problem, but I am worried about geometry. Plasma doesn't have motion or input lag problems either, but I don't want to have to babysit my TV or teach my girlfriend how to watch TV... Would rather not have to deal with image retention, so I'm leaning heavily toward DLP. I'll just have to do my best to correct the geometry once I get the TV, should it need correcting.