You could do a full MTR during the period you're gone, but for me the best and easiest way to go would be to just rent the other rooms in the house as a LTR. 

typically with seller finance there would be some period of monthly payments and then a balloon where you pay off the balance in full. 

What type of MEP work are you putting into the design for getting the sewer, water, power, and internet (assuming you're not extending gas) to the inside of the building? 

Your personal loan has a 5 year balloon period.  

I would be buying into a sellers market in almost any Albertan city.Alberta also worries me as it is known to be super volatile for short periods of time and then sit dormant for up to a decade. 

We also have shorter seasoning periods than most for cash out.  

Second - a DSCR 30 year fixed perm loan to refi the hard money loan and hold onto long term.What others have replied to is completely accurate - it is hard to accomplish BRRRRs right now due to the DSCR refi constraints (interest rates, LTVs and seasoning periods), however, not impossible.

I have never seen a judge turn down a request for more time for a qualified sale, unless the homeowner has already abused the system for excessive periods of time.

Om rrandom bit of advice: you might be able to get by with 1 high-speed internet account if you use aseries of good Wi-Fi extenders, like Eero. 

Have them pay a week or two before they arrive when they are past your cancellation period.