There's just no substitute that's as consistent as jumping in there and learning as you go from experience.

Reading lots of blogs is one thing, but its no substitute for actual training and then actually being a part of a live deal.

To avoid having to involve judicial procedure, which entails a court decision to allow you to put the payoff in a court account, usually after 6-9 months of hearings, you and the seller agree on utilizing a mortgage servicing company, with a substitute mortgage servicer named in case. 

I plan to substitute my eligibility for theirs, however the question I cannot find is how to make the difference between their loan and the asking price of the home.

There's not substitute for lots of research.

If they choose to separate, and the person staying does qualify, we use a substitution addendum to add/remove individuals from an agreement.

If so, you’ll have to substitute your VA loan entitlement for the remaining mortgage balance in his place.You’d be utilizing your VA loan entitlement for a home that won’t be cash-flowing and you’re essentially putting 20% down in order to pay your friend the equity in the home.You’d be better-served to use your VA entitlement on a house-hack that cash-flows with no down payment.

The investors that don’t place a cost on their own labor never seem to get out of the employee mold, they’ve just substituted employers. 

@Josh EdelmanStraight from the VA Guidelines: Any purchaser may qualify to assume a VA loan; [THIS LINE APPLIES TO YOU] however, for a Veteran’s entitlement to be restored, a Veteran purchaser with sufficient entitlement must complete a Substitution of Entitlement (SOE) when the ROL is closed.

I think the rest of my post would make sense if you just substitute out that first sentence.