They offer leads ( for sale) through direct mail which I will try next and see how things go. 

Based on my calculations and preliminary research, I have found that the Bay Area offers good returns from developing land, although acquiring level land and obtaining permits can be challenging.I have a few questions:1) Is it recommended to purchase a complete house plan from online sources like ePlans or similar websites and then customize the architectural design before submitting it to the municipality?

I'm a military veteran that came to San Antonio in 2018 as part of a military PCS and loved it so much, we decided to make it our permanent home.I'm also a fellow real estate investor and a mortgage lender, so I'd be happy to be resource for you as you're preparing to make your move here. 

Does anyone have a good scale on this number or have any resources I could dig into?  

Most of the lots aren't advertised for sale, but you can use the GIS system and other resources to find and contact the owners.

This might be a workable scenario for me.Lack of experience would not kill this deal for us but it would depend on a few things.Usually the biggest challenge for newer investors is in the amount of equity you have available to infuse into the project.You need to have a cash down payment to secure financing.With 25% Down you would be in a multiple financing offer situation where we're just fighting to get best deal possible and batting off Wholesale Account Execs left and right.

Because of my brutal impatience we just had an offer accepted for a 5 unit building with 2 store fronts and 3 apartments that all need to be gutted and renovated.

What services are offered to have a real address for mail and potentially mail forwarding. 

Or if you go to sell it and you don't get what you wanted for it, you could always hold it to make the annual return you were projecting.You should run sales comps to determine if that value is $100k or not, but if you can offer at a price where you can hold it or flip it once done, you will be in a good spot

Obviously, the funds and syndication world has its own SEC exemptions, and you can invest all day in Reg A offerings or 506(b) offerings.