Same with when I occasionally get gas in my vehicle using my company debit card... or occasionally run by staples or buy something off Amazon for my home office. 

You may want to consider that as an alternative retirement investment vehicle, it has number of advantages over an IRA LLC:Custodian is not required (eliminate all custodian fees)Get checkbook control without the need for an LLC (trust is used as a vehicle to hold 401k plan assets), you have full control over the plan assets as trusteeAvoid expensive CA Franchise tax of $800/yrExempt from UBIT on leveraged real estate Ability to take a personal loan from your 401k, any time, for any reasonContribution limits are 10X higher than an IRA (up to $61,000 for 2018)Tax-free investing using Roth sub-accountAbility to correct a prohibited transaction and moreRegarding your questions about getting a non-recourse loan: this is an asset-based loan so the age of an entity is irrelevant.

I think if you had to choose one, multi's act more like businesses so they better cater to investors but I don't think its fair to write off SFH as investment vehicles :)

But, we invest in real estate and it feels like it is just such a better vehicle for wealth.

Stay away from credit card debt or vehicle purchases. 

Please note, I don't need money at the moment and don't have any other investment vehicles that will generate a guaranteed 8-10% growth to my investment.

This is why I love real estate, no other investment vehicle that I know of that allows you to eliminate unavoidable expenses while still making money. 

Continue to invest in both vehicles. 

I love being a private lender but the fact that it simply increases my taxable income makes me consider shifting some of my note portfolio to multi-family perhaps...You might find this discussion beneficial where similar question is raised: https://www.biggerpockets.com/forums/51/topics/604...Owning notes in your retirement account (especially self-directed Roth IRA or Roth Solo 401k) is ideal since you can have tax-free income for the rest of your life if you utilize one of these vehicles. 

I currently live in the State of VA and property tax is huge on vehicles.