Real estate overall is slower during winter than summer.

A common serious issue would be no heat in winter time.

Had to find a replacement tenant right at the beginning of winter. 

It's more work, but in the past, I had good experiences, especially with travel nurses, doctors and affluent out-of-state skiers renting for a whole month or winter.

We did a 10 day sail of the Exumas with friends this winter and I don't think I can ever vacation the same way again.

Quote from @Ben Winter: Hi Yosef, I was truly inspired by your story.

the OP is missing the forest for the trees. 

A simple one page option saying. 1) I understand because of your circumstances you’d like to lease  MTM.2) I don’t usually do MTM leases and it’s harder to lease my property in the “winter”3) because you’ve been such good tenants I’d be willing to make an exception for you at the rate of $x+$200 with the stipulation your provide more at least a 31 day notice to give me time to find a new tenant.

@Forest Wu any of the top 3 organic results from a Google search for "eviction attorney denver" should do the job.

Quote from @Caleb Forestal: I had a conversation with my friend, a real estate agent, a few months ago that really stuck with me.