I’d also pack the tank with more hiding places. They like to squeeze into tight dark places so tile or foam w/ concrete on it is good to add. Google or search on the forum for some great ideas on how to cut foam and wipe concrete on it to make cool rock hides that are light but sturdy.
You’re better with one per enclosure. Females will dominate which leaves one as a smaller, less fed, gecko. 10 gallon tanks are great. A 40 might be too hard to heat unless you have a gecko room or put a solid lid on top.
You can always try. But the best rule of thumb is to house everyone separately. There can be a whole bucket of issues, the most common being that an alpha is established. That makes it hard for the smaller to get any food, even if there is plenty.
You’ll want to make an appointment with your accountant. I’ll just give an example of mine since I’m in California also but each city and county are different and each district can possibly have restrictions or ordinances for or against Reptile keeping, breeding and/or sales. I file as a hobby...
My favorite Hatchling of 2019 so far.
I probably won’t hatch many more than the four I have so far. Just sold off everything except for my most valuable special projects. The gecko room went from twelve to four to one rack in the last couple years.
Anyone know someone that wants to pick up a whole collection? 17 geckos $2k shipped or best offer.