Nevertheless, my concern is that this may well work for a while, but could end up not working once the absorptive capacity of the material is taken up.While the sulfur compounds are the source of the problem makes some sense, that's not proven.

These reports can be helpful to you by pointing out the average sales price, county/city data as well as the market absorption rate. 

If you need to sell quickly, pricing will be most important here so be sure to take into account the local area's absorption rate, active inventory which poses competition to your listing, and average 'days on market' (DOM) when coming up with a price.

what are the current supply and absorption situation? 

While we are doing just fine relying only on cash buyers, I feel the sales and project absorption would be much faster and frankly at a higher price point if we had 25% down financing and reasonable amortizations of 20 - 25 years.

Clara (4.6%), Sacramento-Roseville-Arden Arcade, CA (3.3%), San Francisco-Oakland-Hayward, CA (5.5%).In some metro areas, vacancy rates have dropped significantly in 2017 Q1- Q3 indicating that a fast absorption of apartments for rent and strong growth potential for multi-family investment if rates continue to fall.

It is priced effectively, but due to the ammount of competition and absorption rates I have not been able to secure a buyer.

filling up parks organically can be a long slog  ( absorption rate) with you buying the units and moving them in goes faster  then hopefully sell them in place.. and just collect ground lease.

So it comes down to absorption.. 

If it's a quaint town with lots of for sale signs and a high absorption rate, you have to ask yourself why you want to buy into that market.