Also, would I be able to borrow enough with the new mortgage to rehab it or is that usually with borrowe money like credit cards and smaller loans?

Fortunately, I had reserves and we are able to roll some of these onto credit accounts. 

THe think is how to get a loan from a US institution, as a non resident non US citizen, cant seem to find information of who gives it, how much percentage, and how tedious is the creditation process.Will be happy to be in contact with you.

The 2 mortgages are affecting his credit and he wants to unload the first house.In all my researching of wholesaling I've yet to find out how a tenant affects the transaction.

I've done this on rental properties and got the line of credit in a week.

So, I don't really have a question per se, but any thoughts, tips, etc. on this situation would be very much appreciated.  

The financing issues now: Firstly I have decent credit: 708, 703, 685.

In regards to question #2, really depends on your credit, experience, income and liquidity.

It's what's left over to service the debt after operating expenses have been paid.Another tip, sellers are generally more willing to finance when the property is in poor condition. 

The 2 mortgages are affecting his credit and he wants to unload the first house.In all my researching of wholesaling I've yet to find out how a tenant affects the transaction.