I am looking to use hard money for the purchase and my personal money for the reno.

Work with a CPA familiar with SDIRA tax implications to plan accordingly.Private Placement Memorandum (PPM) review – Ensure the syndication allows for IRA participation and that the deal structure aligns with IRS rules.Direct Purchases with Non-Recourse FinancingLender requirements – SDIRAs can only use non-recourse loans, meaning the property secures the debt, and your IRA isn’t personally liable.

As one of my podcasts say, one person's yuck is another person's yum! 

Call 3 references:  Verify that they work there, or that it is an actual person by asking where they work first, and don't mention who you are until after.  

.- You both report your share on your personal tax returns and pay taxes based on your own tax rates.3.

If directly to the seller, then you need to ensure that the payment is made, but also that it is made to the person who is entitled to it.

Does the LLC file its own tax return, or do you report the activity of the property on your own personal tax return?

And ensure to not intermix the business and personal between the two. 

My personal home loan has a mortgage balance remaining of 157,000 and it's currently worth 550,000.

It truly boils down to personal preference.