Well, my last "thinking outside the box" ideas are 1. that if you simply move the kitty litter jug near the sewer/sump hole, any overflow should just drain off into the hole, if they sloped the concrete properly... and 2. if you only have small jugs (did I just say what I think I said? ) then to extend your period of having to check and empty jugs...
Take one jug, when full, and (assuming you have access to more tubing...cheap or free...!) pour 1/4-1/3 of the jug into 2 or 3 other jugs...and run a siphon tube from one jug to another (or from one to many others). This will give you 3 or 4 jugs (or more) "hooked up together with a siphon", and then simply run your "filler" tube into one jug. As it fills, it will fill the others also.
The only problem will be cutting the tubing to proper lengths, creating a siphon to each one (the biggest problem) and making sure the siphon lines stay in place (another biggie).
I would assume all this work wouldn't be worth it, nor the tubing costs... although if you have extra tubing on hand, extra 2-1/2 gal jugs, and a lot of time, it could be a project to try.
Perhaps just buying a few 5 gal buckets would be worth the cost! (I do something similar with my rain barrels.)
We have gone from one 55 gal drum, to two, and from two to three, for this very reason...drought!
In addition, I also store about 8- five gal. covered buckets and a few 2-1/2 gal litter jugs. This is a lot to store when not needed, but during long droughts, I used to run out. Knock on wood, so far so good, but if I could convince my wife and had the time, I would have a dozen rain barrels around! Barrels, cisterns.... the old ways really were the best!
While a bit of a hassle at times, it gives me good exercise and doesn't cost anything in water, filters or membranes. (And again, if I didn't worry about the wife or neighbors, I would build a nicer and easier way of "handling" the water.
Well, good luck. And with no objections from anyone who has more experience with it, collecting water from the coils seems to be a good idea. I would try it myself, and have no real concerns about trying and seeing what happens.
(I do recall a previous thread however, where coil collecting was "thumbs down" because of the metal leaching into the water and poisoning the plants. Perhaps there is more info to be found about it there.)
Here is one I found:
Who's to say unless you try, really!
Again, good luck.