Randall Monroe's XKCD suddenly becomes terribly relevant here, as Mr. Monroe used to be a NASA consultant. Accordingly, he brings me a chart of how much force I need to apply to escape various planets in the solar system. Escaping Earth's gravity is essentially the same as moving
10 tons * 6379km / .1 s ^2 = 5.87 x 10^11 newtons. Quite a lot of force, for sure, but only 9% of what would be needed if it were a traditional rocket. And, this can be used over and over. Every few months, we can launch another cargo container, until either the batteries or solar panels break down, and if we replace one of those after every launch, the system will run indefinitely. (Solar panels last for about 20 years before requiring replacement. Batteries depend on the manufacturing, but I give them 5 years. We can replace a component once a year, or if we're paranoid, once a month. More than enough capacity left, so every launch should succeed.)
The best part of this system is that it would bank sunlight until launch day. You can't launch every day: there are narrow windows when you can get to your destination with the most gravitational assistance from the other planets, and reach your actual destination in space rather than drifting forever into the void. In the meantime, the system is not idle so much as gathering energy. Energy it will use when the time is right.
I'm hoping that this will reduce space launches costs by a factor of ten. Not as good as a space elevator, but a definite improvement. Did I write this before? I feel the strangest deja vu....