In all seriousness IMHO there is some merit in using a mil spec oil-free compressor in remote areas.
We have had a Rix SA-6 compressor out on site at Discovery Bay Jamaica on one of our recompression chambers for the last 12 years.
A Rix SA-6G is a current mil spec unit, spares are easy to obtain and cheap, only basic tools required for servicing rings and 0-rings no special tools required to remove the heads or valves.
Final points is with oil free compressors is the no oil part. In effect it means no emulsified oil and water to dispose of and the discharge from oil free being pure distilled water, you can drink it, feed it to the plants or fish. A important point especially in a sensitive areas such as a marine park.
Finally on the subject of remote areas is the disposal of the chemical filter cartridges
These dont last long in hot climates.
On some of the other compressors that have been suggested in this post you will be lucky to get 8-12 hours out of a cartridge.
So a longer 33inch type filter tower with a repack cartridge is the cheapest form of filtration, with just the chemical (molecular sieve) granules that need to be disposed of.
With oil-free you dont need the activated carbon or charcoal.
Personally in warm water using an aluminium cylinder only (not steel) I dont bother with the filter, just straight from the compressor.
Or you can stay with these oil lubricated guys and use conventional plastic or metal throw-away cartridges only problem in hot climates it makes you need to import them in by the pallet load just to keep purity. Iain Middlebrook.