I have some liquidity that could help to buy a few multi-units but would rather leverage the investment by arranging financing in the U.S.

I immediately referred him to my property management company and he worked out an arrangement to use his property as a short-term rental.  

Are these arranged on the same parcel?

Doing double closing to another cash buyer is an option with the use of transactional funding when the profit margin is high; is an option.You can also partner with another wholesaler and work with a profit-sharing arrangement to move the property quickly.

You will have to arrange for the downpayment amount somehow because if you don't have the funds for a downpayment, your DTI ratio might also be low which decreases your chances of a mortgage. 

As such, it is not at all uncommon to find the arrangement you have described.

In our property binder we provide the tenant with contact information for the local fire-department where they can arrange to attend a free course on the use of fire-extinguishers if they are not already comfortable with using one.

In addition to the brokering we have a strong capital markets team in house and arrange for any type of financing with equity partners, funds and/or banks and can be creative when it comes to structuring the capital stack.

This arrangement could remain with the sale.

Although, if they're paying via check, then I would try to get them on a recurring direct deposit/bill pay arrangement since paying by check is really just an inconvenience for both you and the tenant.