Damien,Build-to-Rent (BTR) is a great long-term wealth-building strategy, especially if you have a stable W2 and want to take a more methodical approach to investing.

Definitely do more research on the BRRRR method as that sounds like what you're trying to do.

Some have used this method to obtain 100% financing.

You can create your own methods and one stop shop by creating your own leads.

Like the enemy method referred by Avery Carl. 

You can definitely spread your cash out pretty far here using this method and scale pretty quickly with the right boots on the ground team!

Now, it’s time to explore the various methods of investing.

Many opt for other investing methods in their SDIRA like private lending, crypto, private equity...anything except collectibles and life insurance.Note that a Solo 401k is exempt from UBIT on leveraged real estate so if you have self employment activity and no full time employees save for you and your spouse you should consider the Solo K as an option. 

Is the only way to pay for a Reno for my childhood home to sell my current home or is there a method I'm not familiar with that I can use my current homes value to help me out??

What methods of investing are you looking to do?