No comps around? Need help for ARV..Please help...

[Cass R. Smith]

Hi

I know this question has been asked and answered before but in using the search tool I didnt really find anything answered recently.  I'm unaware of things have changed as far as comps. 

The property I have is on 5 acres and there is no comps even close...its all new construction homes and my deal was built in 1971.   The houses in the area are 200-500k but they are on 1-2 acres.

Any ideas to help me get a ballpark arv?

thanks