If you are looking to house hack and go the traditional route, it would most likely give you the lowest down payment option.

The more I think about it, the more I realize that a Solo 401k is probably not an option for me because I will not have self-employment income. 

Hey Adrian - There aren't many options out there for investment HELOCs, and the ones that are available will be full doc...meaning income, employment and DTI are used to qualify you.

There are multiple options for the property, the hardest part may be deciding which one to pursue.

You will then have a few options with that rent money....you can put it into principal or you can start saving it to purchase yet another property.

Higher contribution limits, participant loan option, no UBIT on financed real estate, to name a few. 

We've recently been introduced to commercial/industrial flex spacing and would like to explore this in more depth along with other traditional residential REI.I look forward to all the help and guidance. 

What would you do and what is the best option here? 

Before diving too deep into property searches, it's wise to first determine your financing options.

Most lenders will offer two options:1: 20% down and 20 yr amortization and 10 yr term.2. 25% down and 25 yr amortization and 10 year term.Rates will vary by region, lender, and relationship with your lender.