I am looking at my first rental property investment, with the current rates and San Diego pricing cashflow is very hard, so I wonder if I should remove tax property and insurance from my cashflow calculations as they are 100% deductible at some point.

It might not make a difference to you, but your tax pro and bookkeeper will hate it. 

Taxes 3.

Let's say Taxes are $200/month, and Insurance is $150, and you put $100 in a maintenance reserve.  

There won’t be any taxes and your life will be easier. 

How does the local property tax indentity determine property type and value?

It doesn't really affect me, other than as a tax payer.

Otherwise all that taxes will come due in one year, not good.

Sure if you need to use opm or buy for tax reasons or believe in appreciation, that´s another story, that´s why we always have to ask ourselves why buy that real estate. 

I'd rather not ask my parents or family members to co-sign eitherSo the question is what would you do and recommend in my situation Have you spoken to the seller and said look, I am 19 so I do not ahve 2 years tax history.