@Yang Zeng
Didn't scan through the other posts.. You might want to check out this thread from another Californian about investing out of state: https://www.biggerpockets.com/forums/48/topics/1159104-overl...
This one about cash flow... https://www.biggerpockets.com/forums/52/topics/1159067-less-...
Another about cash flow not being king:
https://www.biggerpockets.com/forums/48/topics/1131066-cash-flow-is-not-king
In the end, its up to your strategy and goals, and perhaps your risk tolerance. sometimes, just one is good enough. The one nearby eliminates lots of risks and headaches. Remember, only because the IRS code defines rental real estate as passive for tax purposes. Its not really passive, at least all the time.
About your 30% down... It might be better to borrow more and preserve some of your cash. For use some of it to help pay for the increased loan costs. Actually, having built-up losses, Passive Allowed Losses (PAL), can be helpful later should you sell or even if rents increase. Meanwhile, youstill have a cash reserve in case of incidents at the property or in personal life. Part of the risk/plan would be to refi when/if rates go down.
Also, you might consider other investments, at least for now. For example, private lending where you lend out your money, take the Note and 1st position lien, and get the interest payments. There is no price upside, but also little downside. Investing in debt can be better than investing in equity --- it depends on your take on it. Fix n flip loans are ~12%. You don't have to do all the work yourself (its one of the avenues I've been doing).
There are other investing avenues since it sounds like you are right on the "edge."
I hope this helps. Happy to chat. Good luck.