You’d going to have to cure inflation and lay everyone off, while building more homes to get prices to stop going up. 

The seller can deliver a Notice to Perform if the date has passed and then cancel two days after if the buyer doesn’t cure the default.

if i don't cure the objection on the survey (basically get a new survey at my expense) the contract could be voided, however i believe they already voided it by introducing a lender wo proper notification. 

Cure and retain the existing lease as is. 

There would be no cure and I would evict if necessary  to make them think twice about doing it again.  

Buyer raised the objection for boundary issue to be resolved a day before closing date; so per contract language, closing date gets extended for 14 days for seller to cure the objection.

Buyer raised the objection for boundary issue to be resolved a day before closing date; so per contract language, closing date gets extended for 14 days for seller to cure the objection.

If the tenant is in violation of the lease, make two offers one offer with the unit empty where the current owner agrees to immediately start the notice to cure process to get the problem tenant in compliance with his lease (snakes and rodents, and possibly even "esa" pitbull ) or to get him out of the unit.

The note has terms to meet else in default and the cure is foreclosure process. 

Either situation requires a cure - go on a budget, get a raise, get a better job, get a second job, lower your current expenses, etc.