It's been a huge source of education and inspiration for me and my husband on our REI  journey.As to next steps, I would recommend finding a real estate agent that you trust, and also start talking to lenders (banks, mortgage brokers, credit unions, etc.)

You're best option to get all these questions answered is to find a local/regional bank (local to where you want to build) and see what their appetite and offered terms these days for construction loans. 

Would a bank loan on the entire portfolio or would I have to get a separate mortgage for each property?

Ditto on the Meet-ups, @Paul Choate and @jj gritts both host great events. 

That is why I never liked buying from other investors or bank owned properties that charge too much in earnest money deposits.

The mortgage company / bank is Midland Mortgage. 

https://www.dallasnews.com/business/real-estate/20... https://therivardreport.com/usaa-bank-lays-off-265...

@Ryan Kinley, I have some success with a local bank in Columbus.

I live in latam, to buy a property you can get from a bank 70% of the purchase price, and the interests are around 13% per year.With these numbers are still valid leverage with the monthly payment of the rental?

There are private money lenders or the bank who can lend you the money.