Sell the thing since you're basically approved and sound "shovel ready"

After taking ownership, we come to find out that the long-term tenants (who are generally lovely and take great care of property - low shovel etc) are actually the owners of the washer and dryer, though it is in common space.In the next year, we plan to put HVAC in the building with in-laundry units.

Also, who's going to cut the grass and shovel the snow?

PM's don't clean units, vacuum, mow, or shovel snow, so those are the things I pay for or do myself.

This development is shovel-ready. 

I cleaned that one out with a big shovel.

I completely get where you are coming from and I more than most think you should protect and value your time and efforts BUT I do think that there was some serious miscommunication between the two parties and that the escalation in price may have been in part due to the misunderstanding that the property was shovel ready when it in fact was not without your drawings.I imagine at this point you have already spoken to your lawyer but I would search for some middle ground on this as this doesn't from my point of view appear to be solely their mistake.

As you're learning, you're going to be networking with fellow students, maybe taking some role in their project(s) - pushing a shovel, a paint roller or a brush, learning about mudding and taping, ...This has the side benefit that lenders prefer educated investors.

(1st floor tenant shovels snow / the hallway lights are tied to apartment 4B's electric bill so the tenant only ever pays $35/month / etc)Quadruple check the money situation BEFORE closing. 

@Peter T.I implemented this and have 9 years without a call for change lightbulbs/clogged toilet/ smelly drain / broken window / shovel/salt sidewalks / bent curtain rods or bathroom towel holdersMove out inspections have no repair issues other than picture holes i walls.You may "think" it's ridiculous, but I'll compare my maintenance expenses with your properties any day.