San Diego is a tough market for cash flow (initially) but adding units seems to be an effective way to overcome the rent ratio. 

@Ryan Bonheyo as most have mentioned, having multiple mortgages will not have a big effect on your scores.

That's how we originally started looking at investments but as we got into it more, we made a goal of how much cash flow we wanted long term and then made a spreadsheet to calculate how many months it would take to get there, changing different factors like down payment amounts, cash flow, etc. to see the effects on the timeline.

Market effectively, price correctly, vet prospective tenant/buyers, and you should be fine.

I think the person who suggested you consult an attorney is right although there is nothing they can do for you now other than advise you what you can and can’t do for the duration of the agreement’s effective period.

Not sure if that has any effect on it.

I had a company ask me for a reference last year before my tenant gave notice and I just asked my tenant to sign something to the effect that they were looking at other property's.Its a win for every one.Turn over is not a bad thing.We have been raising rents and deposits on every turn over for the last 5 years.  

Yes I do read Chinese but is this contract even has legal effect in California if it's mixed with English and Chinese?

Would you happen to know an effective way to get in touch with a local mentor as well advice on how I can add value to them while being new, inexperienced and low revenue?

From the property managers I’ve talked to, some will actually slightly under-price their property in order to have the reverse effect- lots of interest in the rental, therefore they can be picky about who they rent to.