It's hard to gauge the reasonableness of these assumptions without more info on the property (address or at least zip code, age of the property, condition of the various components such as roof and foundation, among other things).I see you've budgeted $0 for repairs. 

You can use it for down payment and closing costs, but personally I'd rather have it on hand as a new flipper to pay for unexpected costs, cost overruns etc so that you don't get to the end of your project and find you don't have enough money to complete it.

The only two options at that point are get used to the smell or demo the affected components.

I had to plat because I changed from a single family to a duplex (this was an unexpected expense).

With a Solo 401k having a Traditional component and a Roth component; can the Traditional account loan the Roth account funds for the purchase of real estate?

Previously, carriers depreciated the materials and the labor component.

OK...not having an address, I can't do a full comp on the property. 

Potential liability could come up in many unexpected ways, such as a trip-and-fall or a contractor injured while on the property.

This was definitely trying to force something that I really wanted to see work as it is in my hometown, but in the end, the numbers have to make sense.When I pursue my first flip, I will make sure the numbers make enough sense that it can get financed and there is plenty of margin in the deal to cover all unexpected expenses.  

Another component is are current rents way under market??