Why was my Type 'O' visa application for investment in a condo rejected despite meeting the total asset cost?

I applied the Type 'O' visa for investment more than 10 millions. For purchase condo. I cost you 20millions to bought condo, but they still refuse my application,........Immigration assistance as following

1. Total asset cost is thb 20 Million (as per receipt)

2. Land cost appraisal is thb10 million

3. Eligible for apply asset must be thb10 million up. So, that your property on behalf 2 person shares asset cost is thb 5 million/each. It’ s not eligible apply for Non Immigration “O”visa. 😕😕. I very comfused that, what is the 10millions standard, why don't depend on the total asset of sale and purchase agreement. I paid for the condo as the price of sale agreement, not the land cost. How should I do, who can help me.