Mail in my city arrives in two days at the most.

The chances you are sending the mailer so that it arrives exactly when 1) the recipient is finally interested, and 2) your competitor did NOT send them a mailer yet, is miniscule!

I arrived at the job site a bit after noon, and conscripted my wife (she was not pleased) to help. 

Your unit property might make the DSCR work at higher loan to value BUT units in a duplex or fourplex do not rent as high as single family as they are less desirable.Those you spoke with need to be honest enough to tell you that second home with units was dead on arrival.

One guest told our team that he drove from Dallas and his e car gave him the low battery warning and he only had about 20 minutes extra once he arrived.   

I am just worried about what happens if issues arrive and I am a 4 hour plane ride away? 

Your expense ratio will be higher than a MH park depending on how many transient spaces you still have, the hours of operation you keep for your onsite staff to accommodate new arrivals, and the amenities at the park that create additional expense. 

Would love to hear what solution you finally arrive at on this ordeal. 

Undoubtedly the wood is arriving from a super dry warehouse somewhere in SE Calgary, not exactly a climate controlled environment.

it only takes a couple of minutes to complete the process up until the guest arrives.