Beautiful piece of equipment, but it is long overdue for a flush out.

From what it sounds like, your flush with capital and are looking to park it somewhere.

I keep the nails where they are and cut them off flush on the hidden side with an angle grinder or cutoff wheel.

If you have an energy recovery system (air exchange system), remember that these filters also need to be cleaned or replaced.Inspect, clean or replace kitchen vent hood filters (non-charcoal filters).Flush all toilets and run water through all sinks, especially in bathrooms that are not used on a regular basis.On a quarterly basis:Check the exterior drainage conditions to ensure that nothing is causing water to stand in puddles for more than 24 hours and that water from any source is not draining toward your foundation.Check your GFCIs (ground fault circuit interrupters) for proper operations by tripping the circuit interrupter buttons and then resetting them.

While I was there, I would flush the others and at least look at them.   

I'm tired of flushing rent money down the drain every month, but 18 months probably wouldn't be long enough to cover closing costs, unless I'm able to force a heck of a lot of equity.

I'm okay with the idea of paying money toward the mortgage because when you compare it to renting, you might as well flush your $ down the toilet!

Theses days there are other brands where the float operation is not a ball on a rod, and some even have dual flush (less water used to flush pee). 

For toilets, I'd been using the 1.28 gpf type, but a fantastic .8 gallon per flush toilet is now on the market, it's called the Niagara Stealth, and it should be purchased at Home Depot(otherwise you're gonna pay like $50 or more to ship it somewhere.)

@Tom Kuhen There is no doubt a balance that will be flushed out dependent on what the Non Money Person brings to the table and just what they are doing.Given your scenario being your first deal and all I would say you should expect to give up a lot, and frankly you should, just to get this experience.