ScubaJill
Contributor
I find the whole would you eat off somebody else's (fill in the blank), eat off someone else's spoon or drink from their canteen comments hilarious. Anyone who deployed to Irag or Afghanistan and participated in a meeting with local leaders can tell you meal stories that would astound Western sensibilities. But to the OP'S question, I say buy and then dive local.
Or worked in development in rural west Africa. I didn't have a gun, though. Just my dimples and pretty good grasp of the local language.
I only have a regulator because it was a gift. Renting for the first 75 dives was cheap. Like $5 for all gear. I likely would have purchased one by now, if I wasn't gifted one, but to be honest, the range of choices and the expense produced a bit of fear of making the wrong choice.