I would consider someone else for now, but eventually plan to replace carpet all together to prevent this from happening again and/or to open up the tenant pool to allergy sufferers in the future.

SSDI is supposedly because your disability prevents you from working.

Is there any way we can prevent this, as wholesalers from crashing our deals?

Ounce of prevention

The tenants should respect the property and maintain it to prevent this from happening just as the landlord should act promptly to eliminate this issue if the source is outside the control of the tenants.

This would prevent the tenants from know they are for sale.Are they SFH?

It might be best to just understand what circumstances led to your current situation, and create a plan to prevent them from recurring in the future.  

Its prevents someone else having to potentially struggle with collection efforts in the event of a default.

Balancing your purchases with your amount of leverage will help keep you in check and prevent you from crashing & burning. 

Long story short. Very good REI friend has a neighbor whom claims to have OCD. This person now receives SSDI and has access to a slew of FREE esq's because of this disability. After some research it has been found ...