If you don't already have one I think you'd be better spending your money on a second hand GVP HC8+ SCSI controller with 8Mbytes of RAM and a SCSI hard drive.
Should be able to get one for $50.
You could install WHDload and all the games onto the hard drive and have improved loading times and no messing about with converting floppy disk images or SD cards etc.
You'll struggle to do anything without access to a PC or a MAC. How are you going to transfer any files from the internet? Surely you've got access to one.