(Side note:  I'm not happy that I know any of this...hard earned lessons of real estate investing). 

If you have no idea what is going on with this capital call, then the bias should be "no" until you understand what is going on and believe that is the best possible use of your hard earned cash. 

If it's just a money grab and there is no desire to associate with the aforementioned, you will most likely be on the losing end and feel very negative about the program.

To Sum it up, its a good idea if you can exceed the cost of capital (higher rate than your cost of debt) with what you earn on your heloc/debt you pull out and invest.The question is how much gains above is enough to substantiate the risk of your variable interest rate, well thats up to your personal investing criteria.

@Jake AndronicoAs desirable areas near city centers become more expensive and densely populated, there will be a resurgence of suburbs located approximately 10-30 miles outside major cities.

I also never had to worry about vacancies: if you own a desirable property, you will always have people lined up to rent from you.

I'm Francisco Centeno (REALTOR)So, cost segregation is basically deducting the depreciation of a property for years.Now, in the hypothetically situation...If both of you combines were earning $700k and you just bought a $2m property, and the cost segregation you got from a professional for the $2m property is $316k.

@James Wise gonna have to disagree with the "lie cheat steal" concept regarding residents.Any resident has the potential to be less than desirable.

Everyone is trying to maximize earnings in this business. 

If you are going to be doing the rehab work in exchange for equity then that value needs to be determined up front with a specific timeline that you have to adhere to in order to earn your equity.