It would be impossible to close in two weeks, with a short sale.  90 days is a typical requirement to get Actual bank approval, thus the time period stated by the seller, and closing a few weeks after that.....SOP.Also, you/the listing agent needs to know about any other junior liens that may need some contribution, other than what the first mtg. holder will offer, in order to properly structure the offer.....the most over looked step in successfully completing a short sale.Also, there is no value in a seller taking his property off the market for 90 days for an offer they know the bank is highly likely to reject, hence the reason to negotiate a reasonable price up front.

Having a good eye for colors and properly staging a property is also important in my opinion.

If you're borrowing from your personal residence HELOC to then go ahead and loan it to your LLC, then make sure that your loan to the LLC is properly documented, otherwise IRS will look at it as a capital contribution.

A LLC will ultimately not protect you as well as proper insurance coverage which you need anyway.There was a post not long ago asking if anyone had actually been protected by having a LLC and I believe there were no positive responses.

I would ask the title company to send out preliminary title showing the wholesaler as the Seller, because that will be the case when they properly carry out the double close.If it turns out the wholesaler MUST hold the property, then the 3 point upcharge for funding is fairly reasonable but it is the wholesaler's responsibility. 

Sounds like these owners took the issue seriously and performed a proper remediation for $40K but you don't know.

is there proper flashing at the head of the door?

Prior to the bill’s passage, water suppliers were not required to properly file and record water liens.

As long as the seller financing is done properly.  

Don't consider using a basement unless it has egress windows, proper emergency exits.Smoke detectors in all bedrooms.Your neighbors may not appreciate your number of roommates so keep it on the down low, no yard parties or noisy stuff outdoors.