+1 on the little Miller's, they are good machines
I used to have a Synchrowave 180 that was a pretty capable little machine. It wasn't much more than the Econotig back then and was quite a bit more machine.
Keep in mind that with the little Tig's and air cooled torches, you are limited to fairly light duty Aluminum. Aluminum just takes a lot of heat. You can run Helium instead of Argon and get a little more out of these machines.
As an alternative to the little Miller's: If you have the space, electricity, and something to lift it, you can get used industrial duty machines for very little money some times. I picked up an AeroWave (Sold new for $8k) at an auction one time for $1200 and it came with 4 torches, 25' stick leads, 25' of 4 ga power cord, and a couple boxes of goodies.
