I assumed we're talking about whats on your form E or corporate return for your real estate business, not your 1040. 

Plus, your documents and accounting better be spot on or they can pierce the corporate veil and what was the point in an LLC.Some say, get a trust, then get a LLC and put it in the trust and then get property and put it into the LLC.

Most people start investing after they accumulate tens of thousands in their 401ks or when they get sick of their corporate life...so 35-45 I would say.

The income from the rental property, unless you're a corporation, flows through to your personal taxes anyway.

Flip properties do have SE tax, with or without LLCs.SE tax for flips can often be partially alleviated using LLCs with different tax classifications: partnerships and S-corporations.

Or just look at the traveling nurses sector or maybe furnished corporate?  

Will depend on several factors like the type of property, type of tenants, your risk tolerance, other assets you own, your estate planning, laws where the property is located, etc.Any lawsuits would be limited to the assets of the LLC and not your personal assets (assuming you run the LLC appropriately and the corporate veil is not pierced).

A Qualified Opportunity fund is any investment vehicle which is organized as a corporation or a partnership for the purpose of investing in Qualified Opportunity Zone Property.

@David Wrenn If you're anything like me, I am getting tired of the Corporate America rat race.

Will depend on several factors like the type of property, type of tenants, your risk tolerance, other assets you own, your estate planning, laws where the property is located, etc.Any lawsuits would be limited to the assets of the LLC and not your personal assets (assuming you run the LLC appropriately and the corporate veil is not pierced).