I don't disagree with some's take that the Sandcrawler is a good investment. I built that recently, and it's an absolute gem of a set.. This is definitely an investment worthy set.
But, it still gets knocked around by so many here because "it's a kids set, and not a true UCS set", even if the overall build showcases it as a somewhat complex technic set.
I dont see why the SW universe can't be broad enough to appeal to both the kids that want bigger sets to display (and or) play with (Ewok Village and Death Star meet this, and i'm sure the UCS Hoth Rebel Base will too), and UCS ship and vehicles that get built, don't have much playability and sit on a stand to collect dust but look pretty cool. I think there is investment potential in both sides. Personally, I prefer building and investing in the bigger play/display sets over the 50 to 60.00 set that most of the time feel incomplete (cantina, palpatines arrest, hoth echo base, and the upcoming Jedi Duel fit this criteria). The ewok village is what I consider a complete set and definitely one of the coolest sets made in the lego star wars universe. That set feels complete. If they continue to expand these large scale exclusives with "hoth rebel bases", "sith tombs", and a larger scale 3000 piece cantina set then they will have more winners on their hands.