I currently own a triplex.

The financial net worth of residents who own a home is much higher than those who do not.

I have 2 self directed ROTH IRA that own LTR properties.

I'm sure it'll benefit you immensely being your own contractor!

The title of the post says "personal loan from your own LLC", but the post itself describes using a "construction loan".

A good way to learn is in your own back yard .

We own a primary residence and plan to stay here (house hacking is not for us), and have been saving scrupulously for the down payment of our first investment property, ideally a 2-4 unit multifamily. 

I have helped a few investors and have just begun my own journey with one single family rental . . .that's why I'm with Bigger Pockets. 

If you're a single member LLC I'm not sure it makes much difference as it will likely flow through your own tax return anyway as a disregarded entity.

Some companies have it built into their price, and some don't, but they do know of ERISA attorneys you can contact to set up your LLC or you can find your own.