I already own an LLC (residential contractor) and understand the liability benefits of running this deal through the LLC.I'm only asking about the differences from a business perspective (taxes, showing the income as business income vs. individual income, etc.). 

I also avoid contractors who have dedicated sales people who drive logo wrap vehicles.I tend to support diversity where contractors who were born outside of the United States or were Veterans in the Armed Forces have worked out best for us.What are your best practices for choosing contractors?

Always enjoy helping fellow investors.

Setting up networks of agents, contractors, and wholesalers in various markets. 

The way it works is you set up your tenants and contractors on the software.  

I’m starting to source off market deals most of which are coming through my contractor.

If you can handle it, you should be able to get five or more fourplexes by the time you are 30 and earning enough cash flow that you will have the financial resources to enjoy life.

Husband and wife agents with luxury brand, own a construction business, licensed General Contractor, retired army officer, successful spec projects in 2004(money was easy then).

At the appropriate point you should fly into town and start interviewing contractors. 

So while I may enjoy knowing what investors can and can't do, I support cities telling more of my clients that they can't do STRs or at least limiting the impact of them.And you're right...for house-hackers, this opens up a lot of other properties to them.