(At that rate, you'll see pretty healthy cash flows).

Every lender is going to want you to have “skin in the game” (ie. they aren’t going to lend 100% of the money) .  

When you buy banks want you to put skin in the game and take on some of the risk with a down payment.

They have more skin in the game then you do.Make sure you get clear title.

You shouldn't need to put anything in if your doing everything else.Though if it is a new relationship, putting some skin in the game helps.This is your blanket answer.

Exceptions also possible as well, but lenders will typically want you to have some "skin in the game" to do a cash-out refi so quickly

if market value rents are significantly greater than the property expenses and you can then rent the property out to another buyer on a lease option, you just make sure you are putting minimal cash down with the seller, and take a large up front cash deposit/down payment from your future buyer....they have skin in the game, and you can put utility and maintenance responsibility on them. 

Might be time to step outside your skin to try to reframe your opportunities. 

On the other hand, by having a trustworthy contractor with skin in the game that contractor has incentive to make your projects a  priority.

You will be compensated solely for putting up your capital into the deal.Either way & for the most part, the property has to be purchased & improved to make a healthy return on your investment.