Like others I was expecting that they replaced the entire unit.Your lease clearly states they need to replace the filters every 3 months, you shouldn't have to remind them but given this happened, I'd also check the furnace filters and anything else (batteries in smoke alarm).

Neither party really has the ability to fully control the agenda so both are going to need to accept some significant compromise positions, and where that will fall is at this point just a pure guessing game.

Two ways to look at a house hack:  from a purely investment perspective, or from a housing cost reduction perspective.From a purely investment perspective analyze a deal as if you as one of the unit tenants will "virtually pay" yourself the same rent as the other tenants. 

Tellus is purely mobile and the UI can be better, but so far it's been good enough and their tech support is very responsive.

Windows and smoke detectors will be our first go to purely for safety concerns.

So if I invest outside of NYC it will be a pure rental investment. 

Super minor, but...was disappointed that the students had removed every single smoke detector battery.

All expensive devices should be plugged into a surge protector and not directly into the ungrounded outlets to prevent damage.Recommend installing a battery backup system on the sump pump to prevent shutdowns during power outages.Roof is towards EOL which means I am looking at high CapEx in near future (less than 5 years).

Our primary residence is purely just our residence with no investment or rental portion. 

A few people (through these forums and in-person) who are just real estate investors have assured me it's purely cosmetic but some of these cracks look pretty gnarly.