Is there anything I should focus on for the design / layout if the purpose is mainly for renting out? 

Likely, you won't be getting many clicks so look at impressions and see if those terms match the intent you're looking to answer when people search.

My main interests will be in fix and flips, BRRR, and buy and hold.

Hitting these targets could be the key to unlocking lasting investment returns.Before diving in, developers need to complete pre-submittal steps, including issuing a "Notice of Intent."

It sounds like your talking about placing offers on properties WITHOUT intent to execute on that PA, that is fraud right there and NAR does not look kindly upon such, nor do brokers or brokerages.

I’m looking for insights on which states allow you to list a property on the MLS as soon as you have it under contract—but before actually owning it.I know that some states have strict regulations around wholesaling and marketing equitable interest, while others allow it as long as you disclose your intent.

Investing was their main focus. 

He had to reset the main breaker that turned off dryer, so it was a quick fix, but said it could prevent messing up appliance and having to pay more.

I am trying to target a savvy investor or younger buyer who want to house hack while living in main home to help with the cost of ownership. 

But my long term is rental mainly.