In my limited experience with a similar service, they will send you leads and even make offers but you still need to do your due diligence and make sure it's a profitable deal for you.

I will call the seller again to make the offer.

Some lenders offer discounts to return borrowers so maybe look into both flip and DSCR rates when finding a lender. 

A HELOC offers flexibility and lower interest rates, which can be ideal if you’re looking for short-term financing with lower payments during construction.

I will offer any kind of assistance that I can.

If you don't have free cash available that limits lots of options, but if you do, that is another story. 

Too many other investment options. https://www.neighborhoodscout.com/ca/san-diego/real-estateAs with any large investment, do conservative accurate underwriting before purchasing in San Diego.  

What if I like a banker but another bank is offering better terms on the first couple deals? 

With a family and kids the best house hack is a house and cottage or duplex option.

When house hacking, consider the area's average rents, property values, and financing options, such as FHA loans or conventional loans, which may require as little as 3.5% down for multifamily properties (if it's owner-occupied).