The payments are generally more than your rent with the extra amounts going to the down payment.

I have been considering asking to buy the single family in cash to separate the deal but would like that amount to be subtracted from the purchase price while keeping the cash I would spend on the down payment the same to include the single family that way the seller gets the same amount of cash upfront.

It's two seperate transactions for tax purposes,  neither one changing the outcome of the other just because they occured at the same time... in theory it would probably be better to simply have the amount of the commission deducted from closing costs if at all possible, but if compensation was already being offered througu listing broker, it is what it is.

If so, for what amount, and on what terms - especially, with what seasoning requirement?

To find out the amount of the subordinate lien through the NSP program, you’ll want to pull the title report for the property.

Most institutional lenders have min loan amounts around $75k. 

They chose to leave voluntarily to avoid an eviction and signed a document agreeing to pay the back rent payments owed (which is a significant amount).

-Is your Adjusted gross income under $100k which would allow you to use some amount of passive losses?

The dirt is worth about 450k because of the amount of units you can put on it.  

Amount invested in Land and Soft Costs = $43,544.