Best case is that they just upgraded it and plan on leaving it...... if so, get that in writing.......but still be pissed and let them know this will not be tolerated again.So I would want some more info before I freak out too bad....If they are basically blowing you off and ignoring you, then I would move forward with legal action by consulting a lawyer about moving forward with an eviction...and be sure to include the cost of a new stove in the deposit

Those are not upgrades.

You can buy upgraded level before tax time and then reset.   

Upgraded units in the same complex are getting between $1300 and $1500/month at the high end.

This is one of those times that your simple upgrades can make for a great ROI 

They won't realize that $350K without putting in at least an additional $100K in upgrades, in addition to the $30K I would have put into it.

I have not done any upgrades nor raised rents significantly at this time. 

I decided to upgrade my Mac to a solid slate hard drive this past spring, cost me about 300 bucks to upgrade that and all the memory...and again, I’ve had it since 2012.

RealtyShares - https://www.realtyshares.com/ - generally focus on mid-market (<$50 million) commercial properties, often for value-add situations involving property upgrades or operational improvements.

Plan on looking at all leases, all unit interiors to access any repairs that need to be done or any upgrades your strategy calls for.