Below are some Craig's List offerings for lathes and mills in CA that may work for you. Like was mentioned above, go for the biggest your space and budget can handle.
On the plus side for buying used, once a machine has depreciated it should hold its value. For example, buy a 1954 South Bend Heavy 10 for $2500. Use it for 5 years and if you didn't beat it up, you should get most if not all of your money back if you decide to sell.
Down side is no warranty and you might have to do some work to get it running. Part availability can be a concern too.
If you buy new, it'll have that "new tool smell". No worries about the history of use. Should have a warranty. Down side is when/if you sell, you'll likely get around 60% of what you paid, maybe less.
Good luck with the hunt!
Bruce
Seller below has both a lathe and mill
https://fresno.craigslist.org/tls/d/fresno-metal-lathe-for-sale/6848953683.html