I'm happy to share my experience as both a flipper and a lender.

If you are moving from your SFR to another property, then you should be able to get a 5% down loan or even 3% if it's FHA.  25% is only if you won't be living in the property in my experience.

Additionally, I would like to attempt to do the process Owner/Builder with subcontracting work out as well as doing some of the work I'm comfortable with (I have some experience with bathroom & kitchen remodeling an am not new to the construction industry).

While daunting, your experiences engineering firm and attorney will be able to guide you through the project.  

I have done extensive research in the risks, how to structure such deals to mitigate those risks as effectively as possible, and legal considerations of each strategy. 

You don't need to know everything to get started; you need a foundation to build on, and the rest will come through experience and then refining your education.You can build a basic understanding of investing in 3-6 months.

I’d love to hear from anyone who has experience in this area. 

Attend your local REI meet-ups and try to find someone who is currently house-hacking or has house-hacked in the past to learn from their experience.

My options are very limitted and the situation is very draining even I follow the bigger pocket advises and I unvested a lot of time in learning and also have years of experience with tenant.

If so, I'd love to hear about your experiences!