Hi, I am selling a property and willing to hold mortgage.

Hey Maximillian, Full Disclosure - I am not a realtor myself, I am mortgage broker. 

Monthly mortgage amount is $780/month (PITI).  

There are definitely a lot of wholesalers doing "DTA (Direct To Agent)" but you really need to know what you are doing otherwise if you are just someone who is tying up their deal and wasting their time if you can't properly dispo it, you're going to burn your reputation.

Can i purchase land and offset the mortgage payment against it as passive loss and wait for real estate prices to go up and hold the property.

The guaranteed portion of the rent from the government provides a stable base, and I've found that many Section 8 tenants take pride in their homes and are eager to maintain a positive relationship with their landlord.Of course, as with any tenant, proper screening and communication are key.

Only problem is with a short term my monthly mortgage payment will be 2K, and will cut deep into my cashflow during that time.With a little work I can get my COC to 3.1% per month for that 12 years.Appreciation is about average in this area and I expect to get about 4% annually maybe 5%. 

However, my wife is finding it difficult to navigate her own countries conventional mortgage process while being away from her country for so long.

More important though is properly screening your tenants you let into your rentals.

We have a mortgage payment and pay for the electric bill.