Sheet metal shear/press brake

I plan to build a plane from plans and am going to purchase some tools. I
would like to have a sheet metal shear and bending brake. I would like to be
able to cut across a 48 inch sheet of aluminum. I found a 52 inch foot shear
at the Harbor Freight web site for about $900. But for about $70 more, I can
get a combination shear, press brake and slip roll. Neither one is cheap, but
they are less expensive than most. Has anyone ever used one of these combo
units? Are they any good? Am I wasting my money on anything less than a $3000
unit? I figure the unit will receive light use working predominately with
aluminum. Thanks for your input.

Dave