Below it is a 2 bay garage with a separate office and bathroom.

If it's oil or propane, you'd need to figure out if each unit was separate or if heat was included, and find out who they were buying fuel from to get that relevant data.

So if all of your properties are in separate entities that could be huge.  

The seller would prefer to sell them together but also accepts offers separately.  

They contacted me today and told me they are separating and that he lost his job.

For one, you can't sell what you don't own...and until you exercise the Option to Buy, you don't own the property...what you do own, or should I say what your LLC owns, is the Option Contract.Also, keep in mind that the Seller and the Landlord are two different people, so you will have separate contracts for the lease (with the landlord) and the Option (with the seller)...even though both the seller and the landlord will most likely have the same social security number.

@Natalie Allen are utilities separate?

Separate two things: possible compensation for her increased costs/damages due to your failure to deliver and he request demand for further compensation.Your lease should say something like “return of deposit is only remedy for failure to deliver”.

What I’m unsure of in Canada is if they count 5 separate houses commercial or residential.

I do not know what two separate bills will do to benefit the situation.