Help/ Info Rehab for Fixer - San Diego approximate cost per sqf

[Alles Andrea]

Looking for some insight from other who have done rehabs in San Diego . 

We are looking at a property in San Diego for our family and were wondering what it would cost to rehab a 2500 sqf home . 

The home was built in  1940  the current homeowners haven't done much since they have used the home as a rental for the past 20 years . The home is currently  divided into 4 units . 

We are looking to combine the units and live in about 1900 sqf and rent out the one bedroom that was built onto the house . 

It looks like the home needs a lot of work we are not familiar how much we would have to budget for in order for this purchase to make sense . 

It looks like it would need proper insulation , possibly a new roof , electrical, plumbing, central Heating and Air installed to all rooms, walls moved to make it into 2 units instead of currently the four it has, kitchen and bathrooms installed, painted on the outside ect .  

We have never purchased an old home but really like the neighborhood and would like to purchase this home . 

BUT 

the home does need a lot of work and I guess it comes down to the fact that it would need to be fully gutted to make it work for us . (The home is definitely not just a cosmetic fixer) 

We would like to get an idea on how much it would cost us to have a  home of this size gutted before we make an offer on such a fixer . 

Any tips/ insight ect are welcome . 

[Glen Gallo]

projects like this are a moving target as there is always a surprise of some whether that be a discovery or a new idea from the homeowner

sight unseen sounds like 100-125k