Since we are just beginning to appreciate the tenacity of life itself, currently we only have ourselves to look upon for some precedent regarding intelligent extraterrestrial life. At this point in developed countries' cultures much of the expenditure is on military spending. We have not progressed past our warlike tendencies. It has been suggested that, were an alien race to make themselves known to us, that they would have transcended their cultural tendency towards war expenditures and spent more time on exploration to the extent that would allow them intergalactic travel.
In the ability to see other planets, Kepler, despite being hobbled by its pointing wheels, has already given four or more years of planetary data and new discoveries of planets within the habitable zone are always being found. Recently the question of what we consider to be habitable has even been revised.
For closer objects, I think we could be doing better; not necessarily for flying saucers but to safeguard our planet against things such as Chelyabinsk or worse. Asteroid 2014 BA14 was discovered by an independent group in Spain by using equipment by a grant from the Planetary Society so this was no large government funding this project. The asteroid is 250 feet (45 meters) in diameter so that should give you an indication of what a small but dedicated team of researchers can accomplish. The problem with spotting near Earth objects, be they ETs or asteroids, is where they are in the sky and their composition. Looking towards the sun is not very successful and if the object is dark, space is dark as well, compounding the problem of seeing it, therefore infrared is a good way of spotting it.
Mathematically, its very possible and plausible that there is life on other planets. How much is intelligent remains to be seen.