One of the mods that I have installed is called "Kethane".  It adds a resource called "Kethane" to the surfaces of the various worlds and moons in the solar system.  This resource can be refined and turned into rocket fuel, but first you have to find the pockets.

The easiest way to start scanning for Kethane (with the Remote Tech mod) is a simple Stayputnik Mk1 satellite with the KE-S210 radial scanner mounted.

Note that you only need one radial scanner active, but I have installed two in order to keep the satellite balanced along the axis.

Payload cost is only 6850 with a mass of 922kg.  At the time I did not have the better types of solar panels or smaller fuel tanks or advanced batteries.  With a few minor changes I could probably get the cost below 6000 and drop the mass slightly.  It does need a bit more battery power then shown here and 800-1000 EC would be better if you absolutely need to map the dark side of the planet/moon.

Keep in mind that this only has a Comm-16 with a 2.5Mm range for communications, so you will need longer-range relay satellites around Mun/Minimus to relay commands from KSC.  By doing it that way, this satellite does not need mass-heavy batteries in order to power the DTS-M1 or KR-7 directional antennas.

(The 2HOT temperature probe on the side of the craft is useless and can be removed.)

The best way to scan for surface deposits is with polar orbits.  So your first launch should be either due North or due South from KSC.  A little bit of tilt is fine and you just need a roughly circular orbit below 200km above the surface (a 100km orbit is just about perfect).

Once you have your scanning satellite in orbit, sit back and watch it run:





As you can see, the higher inclination of the probe at the Mun gives better coverage to the top/bottom of the Mun.