A normal sub-sale transaction would take three months to be completed meaning to say, by the time you settle the balance purchase price to the property, the property would be vacant.

There would not be a difference in terms of the sale procedure because the tenancy does not cross into the completion period.

Your main concern is the state, nature and condition of the property may be substantially different from that you see during your inspection.

Have your lawyer incorporate a term into the sale and purchase agreement whereby you are allowed to conduct a joint inspection of the property when the tenant moves out and impose an obligation to the vendor to fix any visible material defects in the property at the vendors' own costs and expenses.

There should be a bare minimum warranty by the vendor in respect of the condition of the property.