I have the funding available, but the only rehab estimation I have knowledge of is through the books/podcasts I have listened to. 

Listing site estimates roughly $1,700 in mortgage, insurance, & taxes with 20% down.What are your initial thoughts?

I for one will not even attempt to perform a estimated cost of repair or a ARV.

(The reno costs are a very rough estimate... just trying to run scenarios and experiment with the process).

I'm estimating it would cost $60,000 and 6 months to complete the job. 

Hopefully they will provide a good estimate on you permit fee schedule. 

I would greatly appreciate any advice you all may have for me.STATS for property & self :-Primary SFH since 11/2018-No other loans (no student loans, personal loans, or car loans)-Credit cards: 4 in total with zero balances -W2 employee Questions:-Is it better to get a home appraisal before applying for the HELOC, so I know a more accurate estimate of equity?

You could always say to them those additional requests would up the lease terms by what ever amount you estimate.

I have an incredible opportunity for a SFR flip in the San Francisco Bay Area with an estimated PROFIT of $500K!

First off, until you take an action like sell or refi its just an estimate of value.