Pretty much every small business other than some obscure ones that are excluded (see below) If you have 12 Single Member LLCs that own your rental properties.

I am primarily interested in single family homes (to start out at least).

To get started, consider focusing on house hacking in California with properties like duplexes or single-family homes with ADUs, or explore out-of-state rentals in landlord-friendly markets like Ohio or Georgia.

More detached single family homes changing hands than attached leading to higher average sales?

However, not one general location is going to help you determine whether it's a good market for multi family or single family etc.The one true way to start looking into a market is talking to an agent who knows the area.

I want to start house hacking maybe with a single family home or duplex.

As of right now, yes just focusing on Single family fix and flips.  

So I bought a single family home for 315k that was considered inhabitable.

I am single and 42 and doing this all on my own... no one in my family has any experience in the investing side of things, so I am truly starting from scratch.As of April 2025, I will be moving to the Charlotte area (along with my two pups) and putting a renter in my Austin house. 

This can help reduce risk and volatility by preventing overexposure to a single asset class. 1031 is only for investment property.7) Deprecation Schedule resets when the property is purchased in partnership with a DST.