15 bucks and some study will get you your tech license if you pass the test. Some folks say it is real easy no brainer, I disagree, if you do not study for it and you know nothing about radio, you will fail.
As far as equipment cost lol, it will take whatever you got. There is no real good history on the actual meaning of ham but I kinda think "Havent Any Money" describes the wallet well once you get tweaked!
A cheap 2 meter rig can be found for well under 150 bucks and be a damn good radio. An all mode all band mobile will run 800-1000 new and likely not a lot lower than 600 used. you start looking at nice base stations, the sky is the limit, seriously, there are rigs that cost as much as cars lol.
I have about 2500 in toys, not including parts boxes of crap. ham is horrible for the brain, turns you into a pack rat lol. If you buy quality stuff and keep it nice, it holds its value very very well. If you get involved and decide it is not for you, if you came into it with used toys you would likely be able to unload them fast for the same coin assuming you did not go nuts.
If you buy a Yaesu ft857d for 900 bucks new, quit 6 months later and had not made modifications to the radio, you would likely get 700 for it if you did not beat it up. If you bought a used one for 650, you could likely sell it for the same 650.
I feel you can pretty much maintain that across Yaesu, Icom and Kenwood brands, all quality stuff, I am a yaesu fan myself and have 4 of them with a fifth coming soon.
Best bet, hook up with a local club in your area, see about the test, inquire about starter stuff and get help with selecting a rig, your not likely going to be a good buyer the first time if you do not.