After construction is complete I would do a cash out refinance to pay off the heloc and then rent the home with hopes of it cash flowing and appreciating in value.

All,It is my understanding that I can not use a 10% second home loan and put it in an LLC to reap the tax benefits if I STR the property most of the time.

I am still doing my research but home to nail that down in the next 30 days. 

What are the typical qualifications or criteria required to secure 100% financing for a rehab project?

Typically the fees you are listing come with low doc commercial loans.

We also own a single-family home with a detached garage and a separate lot that is currently secured with the mortgage of the single-family home (we've owned this for 10 months).

What are the Best Practices in Planning a Tiny Homes Community?

no one drives buyers around anymore.. thats a thing of the way long ago past. they will drive to the home to open it up for the buyer..

Insurance is going to get more expensive, the government wants to keep people in homes, home equity financing is only growing in popularity, multiple generations are living under the same roof more, and all of those trends are going to lead to changes in how tax law is used and possibly the law itself.

Then I gave them Google Maps routes from their office, to Home Depot, to my property, and back to their office...with an hour to procure the few things they would need at home depot...all at their (absurd) hourly rate.