There is no real QBasic on the mac as it is DOS based, so ayou just need Virtual PC with DOS
Real basic might help in creating QBasic but I dont have any experience with that
I have run Qbasic programs within VPC and they worked
If you dont have VPC , just stake out the trash bins on garbage night and pick up an old 386 or something, a friend of mine found a 286 PC laptop in the trash and it still worked.
QBasic was the first programming I learned, if it was Java instead I would be a lot further ahead.
What kind of program are making or running?