Unless you have a big cash reserve already I would not take that chance

I have seen numerous Zillow estimates that have dropped 10%-20% after being listed.

97% or more of undercapitalzied business's fail.. why is wholesaling any different its not.very small percent that truly have no means will do anything until they build a modest war chest or capital for their business.. its the same selling real estate as a licensed agent.. its not the business to get into if you dont have savings.other wise get a paying job for folks that are in the business build up your war chest and experience bucket you stand a much better chance than listening to the yes you can do it with no money no credit no means blue sky ra ra ra

@Stephen Herbert seems like most estimates are low from the beginning, with the contractor strategy is to the job secure first, then up charge as the process moves along.

I am looking at a property that I can potentially add another 1000 SQFT (from 2/1 to 3/2 or 4/2), and wanted to get a general rough estimate on the cost I should expect.

I'm getting just some general estimations that don't give me a lot of confidence in what exactly I can purchase.  

So it sounds like I need to figure this initial involvement of the contractor as cost of analyzing deals. ...because if the contractor comes back with an estimate of repairs that is too high to make the deal attractive then I'd be out that fee for his service.

@John Hein make sure you pinpoint your ARV probably wouldn't be a bad idea to get a contractor in there as well to give a rehab estimate if you have time for that.

I used the lower end of prices as leasing price and after repair value based on the Zillow estimate.

LOL their parameters is great chance of performing and returning capital.. off load the ones that are not.. !!