Be careful re ATC. Their recruitment standards are as high as the airlines. Afterall, they are going to pay for your training as well as give you a wage. Training takes at least 18 months. If they think you will jack it all in soon and go flying then they will not select you.
I am currently working in operations for a small night freight company. I have already got all my licences so I don't actually need it to fund my training. I just need the money to live. Ops isn't a bad ground job because it exposes you to other aspects of the job that many pilots don't see.
There are plenty of ground jobs that will assist you in getting some money together. However, unless you win the lottery the money will not come to you quickly.
Ops
Despatcher
Engineer
Cabin crew
Loadmaster
Baggage handler
The list is endless.