It sounds like you navigated the challenges well and gained valuable lessons for your next venture.

I personally used business credit cards to BRRRR a deal—no money came out of my pocket.

Can't imagine being in business with characters like this. 

I believe this law presents a great opportunity—not only as a sustainable business model but also as a way to help people in need.However, I have no experience in real estate or foreclosure auctions.

Hey Kenny no it's more out the money to work and if needed get personally involved right right now have 3 clients I helped raised 175k in 0% interest business funding with 12 months 0 apr and they want to get going in real estate and make modest returns not shooting for home runs 

I’ve been in the real estate business as a broker, helping clients buy and sell homes, but I’m looking to take things to the next level by diving deeper into investing.

Quote from @John Lasher: I've heard from so many investors that they have put a pause on their flipping business.

I'm going off the understanding that you still need to spend 500+ hours in the business to achieve material participation (please correct me if I'm wrong). 

May negative cashflow until fixed.3) Buy established business: assuming you mean something other than real estate related.

Always do your due diligence folks, search for their name on here, check for criminal and civil court cases in the county they live/do business in, etc.