How to pull comps when there are no comps near

[Benjamin McCrite]

So I found a house that the husband converted it to a dentistry for his wife. The wife is now retired and they are trying to sell the home.

I really have no clue on how to pull comps for this because it’s in a small town about 40 mins away from a city and there have only been 3-4 homes that have sold in the last 2 years and they are not comps for this house. 

We would have to completely rehab it and convert it to a home which is going to cost a lot probably about 70k so I want to make sure to purchase it at the right price. 

So any ideas on how much I’m actually going to be able to sell this for should I just keep expanding the area for comps until I find the right ones. 

Any help would be appreciated I’m kind of stuck thank you.