Adding extra walls or portions of walls would add to the cost of encasing them. 

SELLER CONCESSIONSSeller concessions include, but are not limited to, the following:Payment of the buyer’s VA funding feePrepayment of the buyer’s property taxes and insuranceGifts such as a television set or microwave ovenPayment of extra points to provide permanent interest rate buydownsProvision of escrowed funds to provide temporary interest rate buydowns,Payoff of credit balances or judgments on behalf of the buyerSeller concessions do not include payment of the buyer’s closing costs or payment of points as appropriate to the market.Any seller concession or combination of concessions which exceeds 4% of the established reasonable value of the property is considered excessive, and unacceptable for VA guaranteed loans. 

Is an effect counter argument that the down payment is small but I'm paying you an extra $150,000 more then anyone else, not to mention the interest you make on the $550,000 for the 5 years?

If you are making HUD offers from out of the area there are a few extra steps that need to be taken to submit offers and tender a closing.

How much is fix up with an extra 20% fudge factor for problems that will occur? 

If the Seller wants to try the rent-to-buy scenario, he could also put that idea to his existing tenants as incentive for them to pay him extra per month?

A lot of times it's nice to have an extra hand on the job.

I'm looking to start wholesaling to gain some experience and extra cash at the same time.

I'm looking at a house that could be flipped and held.I'd also like to have the extra acreage it has and block it off for RV's to come and hook up, I'm however confused on if I should purchase this property as an LLC(which I haven't created yet) or if I should buy it as my personal estate and just rent out sections of land.

Instead of looking at putting down extra money to reach your LTV necessary to eliminate it, potentially look into requesting a new appraisal if you think the value has gone up from your purchase.