They selected a So Cal title company and a escrow company and said it's too late to change now since we are going to close on Monday.I am purchasing this house by cash, and I see they listed the lender's title insurance for $1650.

What's the criteria for selecting? 

Not many syndicators are willing to take a personal loss if the deal goes south.3) Deal Selection and Underwriting.

While you are not required to have a property manager for your long-term rental (short term is a different story), you can only handle administrative functions such as making phone calls, paying bills, selecting a contractor, etc. and must be completely hands off. 

These include market analysis, property selection, guest communication, listing creation and optimization, and more.

I am not sure where to begin. with your septic and well you'll need to do site layout first with a land planner or the county. after that you'll need to check setback requirements and design plans and start budgeting with a builder. once you have a confirmed plan set and budget broken down and builder selected then you can talk to banks. most people think it starts with banks 

One of the main challenge that I observed is that individuals often lack a clear end goal or strategy, or they select a market that doesn't align it.

Select a specific area of real estate that matches your goals, preferences, and willingness to take on risk.

If you mail, be sure to mail to the correct address which can be found on the instructions (first result on google if you google "form 4868")If a payment is due with any of the above, you can include a check with your mailed form, or you can pay directly through the IRS DirectPay system and select "extension" as the reasoning for the payment.

You can invest in any market selecting the ones that you believe are seeing growth, and do it remotely.