I would suggest that you interview several Realtors and ask them the following questions, to ascertain if they are truly Investor Friendly, or if they are throwing you a sales pitch.1.

Your first objective should be to contact the owner to ascertain if they even want to sell.

You will need to ascertain the answers to these questions and then you will likely answer your own question.

there are many different calculators on biggerpockets  that should help you ascertain the max offer amount  What risks do I run other than looking for an Underground Storage Tank?

It sounds like you don't usually include reference checks as part of your screening, which is an easy way to ascertain whether or not someone has displayed signs of being a not-so-great tenant in the past.

Because of this the firm/practice/CPA you received the quote from will usually need to prepare the federal return anyway to get the CA return filed.Highly encourage taxpayers obtaining a CPA/EA for the first time to obtain proposals from multiple CPA/EAs and ascertain the value they'll receive for each fee. 

Think of critical questions you can ask them to ascertain who will be your best choice.

Since you're new to this business, have you had a seasoned investor help ascertain the actual ARV?

If you see a particular property out there that you're interested in, then you'll be able to ascertain more reliable information and inputs for your pro forma. 

The ones I'm looking at are less than $100K.I'm working the numbers in the BP Rental Calculator and am trying to ascertain what to charge for rent.