Dooh lots of variables when you are talking about rentals.
First off you need to figure out what you are shooting for, cash flow or appreciation? There are alot of people that subscribe to the 50% rule. That is, your operating costs should not be more then 50% of the rent. So adding up all your monthly costs, if they are more then 50% of the rent, conservative real estate investors would say pass.
Also as pointed out, there may be better investments for 300k cash then what you are thinking of.
You need to specify all of the parameters better then you did in order for anyone to tell you if it is a good deal or not. Without even looking I can tell you that it is not a good deal compared to other states or even other possible areas in California.
