Welders!

[Reinovator]

Spool guns can be a very good investment but be for you do.
give yours self a check list of pros and cons.
Alum welding is not as easy as the demo.
but it can be learned. In my opinion if you plan on working a lot with aluminum.
DO IT!!!
If not check with A GOOD welding shop on getting your work done.
See how much your wire will cost.
and try using the schools spool gun, some time they'll have open labs where you can use their equipment to hone your skills. Practice Practice Practice.
Then make your choice.

But above all make it fun. not a chore.