Offering the equity of additional property is typically not a supplement for putting cash into the deal.

I currently work in the Supplement/Sports Nutrition industry and have a background in health insurance. 

If it's below what it should be raise boiler temp and if not she can supplement with electric heaters at her cost. 

Medium term goal is to generate enough passive income to modestly supplement our incomes.

If the latter, you would have to supplement all funds needed to make the purchase above the amount the lender is willing to lend against their value of the property.  

A subsequent divorce, new child support payments, less time with my kids and having to rebuild my life sent me back on my original quest for passive income streams as well as re-establishing supplemental income from wholesaling with a new strong desire to complete my first rehab/flip but with an obviously significant need for private financing and/or hard money partners to help. 

I want to learn how to take my "small" income and turn it into something I can be proud of by investing and supplementing it.  

How are you going to supplement your current income during the transition.  

My own personal income can't cover the kind of mortgage that's going to take, even with a supplemental rental income to defray it.

I'm an airline pilot and my wife a dental hygienist, looking for some passive income to supplement our regular income.