Stephen,, I agree now take a look at actual sales results of halls. do an ave and you have an aprox of what they sell for. https://www.loopnet.com/Listing/18353865/104-Buckner-Road-Dover-TN/
https://www.loopnet.com/Listing/17917363/3161-Oro-Bangor-Hwy-Oroville-CA/
Doing a quick search I see them run from 165k to 450k depending on area. I can see the avg sale price at a quarter of a million but this is far form what the cult paid to have it built.