Renegotiate the sale price lower to account for the added cost.

Re-negotiate with your providers on cell phones, cable/internet, insurances, etc. 2.)

No, it is none of their business.People need to stop thinking that a wholesaler should bow done in submission to cash buyers.the only thing the cash buyer needs to be concerned about is whether or not the deal presented to them satisfies their requirements or not, including the profits.If it does, great, buy the contract, if not,  either renegotiate or walk away.Of course, some wholesalers are very unrealistic with the numbers, but that is on them.That said, it is easy to find out how much a wholesaler is making especially after closing.

Once you get through that & get a new tenant in the unit, if you still aren't seeing the cashflow results you feel you should be, I would suggest renegotiating your contract with them. 

The other side of the coin is he can use the inspectors findings to renegotiate the price.

If they keep the place in good shape, keep them in there and when things improve that's when you renegotiate with them.

I have a clause in my lease that says that if the tenant asks for more than $200 in aggregate improvements then I have the right to renegotiate rent.  

Best practice is to always reference the term in the rental agreement that they are violating and tie it to remedies available to you by your L-T law.In your current situation, since you say the tenant is "dirt poor" and you sympathize with their situation and the storage unit is sitting empty, it may be a good idea to renegotiate the agreement.

Things can always be renegotiated now, but not after closing.

At that point, if the tenant can't pay, you can either kick them out or re-negotiate the rate.