Although with that 35 dollar cost from Zillow, she has the liberty to apply to as many apartments in a 30 day period. 

I'd also reach out to your prior walk throughs that were interested and let them know the other tenant couldn't move in so you wanted to give them first shot at the place before relisting it. 

Although that money would be tax free it puts you in a tougher position down the road and you may even have to do a cash in refinance depending what your property appraises for.

Although, I'm not fully convinced since my CPA is not a qualified immigration professional.  

I’d let them go but provide them with help to move.

Engineering makes ok money but I’d like to make an additional 40-50k a year at least using real estate.

The last thing I'd want is to be unable to refinance into a traditional mortgage, then i'd be stuck with a rather massive bill to pay at month 12 that'd i'd be unable to actually pay haha.

I'd be interested in seeing what land notes your partner has available.

I'd like to offer her a financial incentive now. 

I'm newer to investing myself; still trying to figure it out although i've been a real estate broker for many years and do actually own a few rentals.