They are adding a second covered arena at SELP in Ocala. The new arena is on the back of the property. The arena is the same size as the front arena but will only have seating for about 300 instead of at least 4500 in the front arena.
It is supposed to be completed in February 2017 and it looks like MADTA will be one of the first to use it for their February trial.
If you look at the current satellite view (https://goo.gl/maps/nX6Y4T8N2An) it appears to occupy the space that was utilized for the open air oval arena at the top of the property.
The following is a link to a news article including a video with commentary by the SELP facilities manager.
http://www.ocala.com/news/20160721/new-covered-arena-going-up-at-se-livestock-pavilion