Give them 5-10 days to accept the new terms or accept that they will have to vacate by closing.If you write a detailed contingencies addendum into your offer, the seller will have to facilitate this process for you.You have to increase rents to be able to maintain the property properly and still protect your returns, especially since there will be likely be a higher note carrying the property.But be ready that if any of them accept the higher rent, they will also expect their return on maintenance.

They were certainly willing to take their 10% every month, but it looks like they didn't do anything other than facilitate repairs that the tenants called in.  

My only advice, find yourself a reliable, trustworthy escrow company that understands the wholesale transaction and will help facilitate it for you.  

The point here is because the standard real estate contract is so widely used in the industry it makes it a widely excepted contract to facilitate real estate transactions.

I've begun putting our investors capital into perspective, and while "$1M insurance policy" sounds exciting at first, I have to remember I live in New Jersey where that could hardly facilitate two deals at once, if that.

., how do we go about facilitating this?  

When I find a property I want to acquire from marketing, I call him up, and ask him to facilitate the contract for a small fee.  

When one conspires with another in the commission of what is illegal or unethical dealing, when yo know you're buying from an unlicensed wholesaler, one who probably obtained a contract under questionable means, are you not conspiring to facilitate that transaction?

That said some titles companies may prefer that they don't facilitate the transfer - but I would insist that they do as it helps create a paper trail of exactly what is being conveyed.As @Wayne Brooks mentioned an estoppel letter is also highly recommended (and perhaps required depending upon state laws) - this is usually completed prior to COE, so there are no surprises on the day of closing (or later when a tenant moves out, pays the wrong amount, etc).

I have 5 acres of land with two houses. I want to generate multiply streams of income from the land and the extra building. How or where do I start?