We BRRRR 8-10 per year and the flips supplement the money left in the BRRRRs. 

There are other forms of winterizing like insulating plumbing, sealing door/windows with rubber gaskets, installing storm windows/doors, setting up heat lamps or other supplemental forms of heat in basements, etc.

We BRRRR 8-10 per year and the flips supplement the money left in the BRRRRs.

This K-1 information is then used to report your share of the partnership's income or loss on your personal tax return (Form 1040) using Schedule E (Supplemental Income and Loss).

The whole appeal in REI was to maybe create a small business on the side with my spouse as a way to: eventually secure supplemental income, start building equity in RE and maybe creating a small business together in RE that would help us obtain financial freedom after hearing how risky things can be, I’m trying to learn: what are other RE investors doing to make money despite the risks around home repairs, vacancy, additional expenses (i.e property managers), etc.

You may want to look into forming a captive insurance company, which acts as a supplement to traditional insurance.

Keep the search going for someone with a cap less, shall we say, herbally decorated.Good advice indeed.  

I'm currently reading a book about emerging markets, you're supplemental answers would be great. 

Once built use one home to live in and sell the other(s) to supplement the cost of the primary home?

You Tube and other platforms have made it possible for a lot of these types to enter the space They shill crypto, supplements, only fans and now real estate.