Sounds like you are a beginner, running on dreams. Good for you! Do it!
Make sure its a FUN boat to sail. If its not fun, its tough to put up with the sometimes extreme discomfort and pain. So avoid most boats that are called cruisers.
Make sure its a very, very SIMPLE boat. Everything on a boat, from the most trivial cotter pin to the most hideously complex and failure prone
diesel (not simply the
engine, but all the stuff absolutely essential to that engine), needs
maintenance, needs attention, and if you don't see the hidden crevasse
corrosion in that
stainless steel thingamajig (shroud, toggle,
rudder post, ...) then your life will truly suck when it fails "without warning." Only consider very, very simple, rudimentary boats. Every
single thing, every piece of "turn key world cruising equipment" will make you weep.
Make sure it is in as PERFECT condition as you can find. Do not ever, ever, buy a
project. A boat can be in better than new condition at any age. The cost to keep a boat in better than new condition is never realized at selling time, so getting a well loved, perfect boat is the only kind of deal to close. Consider absolutely nothing else, no matter how little
money you have.
Respect your budget. Buy perfect in your budget. Never, ever buy for size. A tiny boat can be sailed around the world. A boat bigger than you can afford will end up rotting at
anchor, a total piece of s--t that will embarrass and pain you to the bottom of your soul, if it does not literally kill you.
If your budget is tight, as it seems to be, think like someone who is hiking the Pacific Coast Trail. Don't think like someone who intends to go yachting to Monaco.
Then GO. Its wonderful, the best way to live.