tobago

I live about 200 miles from a refilling station and I would like to buy a used, but still fully functioning, compressor to fill my own tanks. I live in West Texas. If anyone has had any luck with more affordable compressors and modifying them to produce breathable air please let me know.

I have an option for a week on either island for Diving next November. Have never been to either. I am looking for opinions - my wife is a land lubber (non-diver) so need something that can keep her happy above the surface and keep me happy below. Any thoughts on either destination? Thanks M