If you find and fund the deal, usually you can negotiate a 50% equity split with the experienced investor that finds the GC, the necessary subs and makes sure the renovation stays smooth and on track. 

All comes down to numbers and your negotiation skills.

Would you negotiate closer to appraised value?

The other one fell through - seller not able to negotiate on price.

WHOLESALE a few deals to get an understanding of how to Market and FIND motivated sellers, negotiate with them, do the paperwork, market to a take out BUYER, run thru the escrow process, and get paid.

I am purchasing a new home in Budapest and want to negotiate the price.  

You negotiate interest, amortization, balloons, etc.

After the lease signing, I am sure a tenant could negotiate this storage for an amendment, and supplemental storage fee.

I've negotiated a lot of short sales as an agent.  

I get 2.5 points charged with each one of the two loans, I have no leverage to negotiate the 30Y mortgage rate, no closing credits and if I want to refinance with another lender in the market I'm charged a hefty fee that will make the other loan unattractive anyways.