I wish I could give one but any estimate I’ve ever made hasn’t been even close. It’s been far longer than I ever thought possible due to unexpected issues that come up. So I’m pretty sure more will arise but maybe I’ll be able to find workarounds if it doesn’t take too long. I’ll work on it a little every day and that’s about all I can really do.
You can use WordPress with the current version if you want by installing the MDS into a subfolder and then using the Advanced iframe plugin to display the grid and other pages of the site. You just have to edit your header.php and footer.php files in the html and users folders to remove the extra elements of the page. Then you can make the iframes auto size to height in the plugin options.