I will pay the money if I can do 1 or 2 deals in the next 4 months.

How much is this individual paying to park a trailer there?

We only needed to pay earnest money and a portion of the closing fees bring upfront investment to 12-15K.

So I did not pay extra for it, but chose it anyway over other places.

@Helena Lee, I do not have experience with it, BUT I would expect to pay capital gains on the bitcoin. 

Quote from @Jake Handler: For anyone that has been a buyer or seller of a seller finance property, what method of payment and tracking did you use for buyer to pay seller monthly? 

Someone who is paying $900/mo to rent a 3 br apartment is given an  opportunity to pay $700-$800 mo with prospect of owning the house, if they never default.

Pays on time?

:)As for LTR rental terms, usually we sign a 1 year lease where tenants are expected to pay Electric and Gas if applicable, while the owner typically pays water/sewer/trash with the city. 

We almost went with a loan that we have to pay all the cost upfront and then get reimbursed on the back end and that was just not something we were willing to do.