Our lease requires 60 day notice of move-out.Our lease requires the condition of the house be restored to move-in condition, minus normal wear and tear, before move out, to get full security deposit returned.We are updating our lease and was wondering if there is something legally defensible we could add...We are also able to start showing the property 60 days out.

The best defense is a good offence.  

Tennessee has a 6 year statute of limitations, which means that if the bank doesn't foreclose soon, then within about a year Maria Smith can prevent foreclosure by claiming the statute of limitations as a defense. 

Unlike others I see no reason to get defensive because of some other investors philosophy.

My partner contributed his land, and found his own 'silent' capital partners - so the attorneys had to negotiate some defensive clauses to ensure each of our 'sides' were protected.Since he is contributing the land, but you are contributing actual capital, consider having your lawyer negotiate a clause where you both are 50/50 voting partners (and both guarantors to the loan), but you get all the income distribution (minus what your partner requires for annual taxes) until your capital is repaid; you can even specify who gets what percentage of the tax depreciation credit. 

Ain't that supposed to be the first line of defense? 

If they are defensive, it turns me off, but if they handle it well, it makes me think even higher of the business.  

For safety, I would suggest some self defense classes in addition to / in lieu of concealed carry.  

The most sobering aspect of executory contract regulation is that there are no seller defenses, even if the arrangement was the tenant/buyer’s idea to begin with.

Tenants get immediate defensibility for broken leases, withheld rent checks, and general complaints.