The HD1000 is pretty low maintenance. It runs failrly cool compared to others as long as it has enough open space around it. The manual says you should clean the grills from the outside from time to time.
As far as UPS's, I have one on mine, but only because I live in the country and experience frequent short power outages. The UPS just allows us to continue watching the show if there is a brief power drop. There are many threads debating UPS's with projectors. I've used an inexpensive stepped sine wave UPS on my projectors for years without issues. If you don't have regular power drops, then a UPS isn't really necessary in my opinion. If the power drops, just leave the projector off for at least 30 mins to allow the lamp to cool before re-striking.