Hey Joel, I'm not a wholesaler (not my niche), but I would certainly add to the list the purchase and sale agreement for your seller to sign thereby securing the property under contract and if your list is in order of 1st to last, I would place establishing a buyer's list as number one, even before initiating your marketing campaign to prospective motivated sellers.  

The neighborhood my rental house is in is an older established neighborhood with no new construction.

By 2017 Q2, I hope to have established a family owned investment company. 

Above all else, I'm looking to continuously gain knowledge of real estate, and establish viable connections within BiggerPockets and in the field.

These plans are more expensive to establish, but will likely save you money over time through the elimination of transaction and asset based fees typically charged by a custodian.The difference between the IRA LLC and Solo 401k has more to do with your situation.  

I would establish yourself with a bank ASAP and let them tell you what they'll accept.  

Again, not worth it since I have other established accounts and not wanting more hassle than I need.Had they a presence in Maryland I would have been able to use my investment property that has far more value than my primary here in Florida.

As a disclaimer, I'm not affiliated with any professional RE organization and I am re-establishing myself since moving to the bay area.  

After establishing a relationship I've found they want me to do well and will help out however they can.

There are some advantages to sticking to one market that you know well and have established contacts, however, real estate is local and different markets perform differently giving you an opportunity to hedge your risk.