Since you’re staying in or around Hato, Dive Friends makes sense for tank rental because they have a drive-through and small shop close by (at Hamlet—five-minute drive), which is also the entry point for a nice wall dive (Cliff). They do have an up charge for Nitrox, but virtually blanket the island with tank drive-throughs, and now also have the concession at Bari Reef, which gives you easy parking, easy access to tanks and a site which is a favorite of many from a great dock. VIP will deliver tanks to your house (others may also) for a fee, but Nitrox is the same cost as air, so the delivery doesn’t cost much in the end. As to boat dives, you might check out Div’Ocean. They have a quick outboard with max eight eight divers, and if you’re doing unlimited tanks from another op you can bring your own. They also do guided shore dives, as do most (all?) of the ops.