What i meant was, how long did it take you to finish design and creation of your first mission as that will dictate how long (on average) your demo will take to complete production.
I took a week or slightly more to finish design and creation of my first mission. Now the first mission looks complete, and now it needs some polishing, testing and touches. I estimate one or two months to complete production. But modeling work took some time and effort and patience.
The first mission gives us a look at the Ysusi jump node deep inside the nebula. As you know, Ysusi is a semi-canon star system.
The Twinhook A type, and the B type (called the Faker), have had a makeover too, but looks very thin compared to those seen in Galaxian 3, Starblade and Star Ixiom, making it hard to hit. Nonetheless, they are armed with secondaries in addition to primaries.
The UIMS Danube Class corvette is obviously a placeholder based on the 2011 Inferno model dump's SOCv Chiron. However, the Nova Class of UIMS destroyer, which did not appear in the first mission (and any subsequent missions), is based on the SOD Rapier placeholder as well, but lacks turrets and subsystems. There's no sign yet of other UIMS vessels (mostly based on existing placeholders, and most of them come from retail FS2): the Twinhook C type, Hawknose, Flatter, Winghead bombers, Starhead cruiser, the Commander, Duck-Bone, FATS/Twinhulls, Hammerhead and Deltanose, as well as the Cylon-based ships, to name a few. Despite this, the 8000-poly Deathball A (I got it into the game) appears on Mission 4.
Still, there's no word yet on the Vishnans, the Vasudans, and possibly the Ancients, the Battura, the Bosconians and the Sadeen. Presumably they're being kept secret until the demo is released – in December this year.