As Tommays said, it really depends. What level of comfort, automation, electronics, and such you're looking to have.
One one extreme, you can liveaboard a boat and cruise without any electronics, using only a handbearing
compass,
binoculars and a chart to keep track of your position. You can use a solar shower, and hand
pump the water for the galley and head sinks and use oil lamps for
lighting.
On the other extreme, you can have
radar, a
GPS chartplotter, microwave
oven, 110 VAC, air conditioning, refrigeration, pressure hot and cold water, a TV, stereo, DVD player, laptop computer, an
autopilot,
VHF,
SSB, and an
EPIRB.
Or anything in-between.
At a minimum, a
handheld GPS would be nice, as would a
VHF radio, preferably connected to the
GPS with DSC capability. I'd point out, that even if you have a good
chartplotter,
PAPER CHARTS ARE A NECESSITY.
Self-steering is nice, but not really necessary for coastal sailing IMHO.
Roller
furling headsails are nice, but not necessary.
Good
ground tackle is a necessity. It is also an important piece of safety gear, and for cruisers on a budget a great way to save money—since anchoring out is generally a lot less expensive than using a marina slip or mooring.
For a boat that size, I'd recommend a 22 lb. or 33 lb. Rocna or a 25 lb. or 35 lb. Manson Supreme
anchor, with 30-60' of G43 high-test chain and 200' of 5/8" octoplait nylon for the
rode.