I am writing this because I appreciated the call and while I have no affiliation with them or have experience working with this company nor have I invested with them - they answered the phone immediately. 

Just a bunch of kids answering the phone and writing bad commitment letters. 

Have an amazing weekendI've had my lawyer write up an agreement for me one time.

Fees should be clearly stated in writing, easy to understand, and justifiable.

What the customer "expects" and what you are getting paid to do should be in writing .

If we bite off people’s heads when they admit disaster, it suppresses legitimate issues with these techniques.Just for context there is a lot of history with the OP and some of us on here going back years (like the thread I linked to above from about a year ago and several others if you use the search function with his name) with him minimizing the risks of how he was structuring these transactions and some of us being cautionary, warning him that exactly what happened here could happen, which made him defensive and dismissive. 

Keep in mind if you are house-hacking, you will only be able to write off a percentage of the bills.

He asked me to put the offer in writing and get it over to him that evening so he could pass the info to the seller.

Write handwritten, honest letters.

I would notify her in person and in writing (big note on her door) including quoting the clause in the lease where she is responsible, and tell her you will be inspecting to insure the heat remains on, high enough to protect your unit, or she will be breaking the terms of her lease and also liable for any damage done in the downstairs unit as well.