I would breed every female right now with your Mojave. They will go into building mode and will gain the weight if they are ready to lay. I had a 1100 gram female build to 1700 grams and drop 7 eggs for me in three months. If they are not ready to produce they usually wont. As far as the market goes I can say I could sell 50 female mojave females between $250-$300 at a single show if i had that many. Pins, pastels, and spiders sell but not as easy. I would breed your females, feed them as much as they will eat, feel for follicles, and pair them up again. keep feeding your males small meals to keep them breeding. I feed males rats and if they stop feeding I will offer mice (I know a huge NO NO to most people) to keep them breeding. I think you should go for the gold if you have a good access to rodents and can keep your girls on food whenever they look like they want to feed. If you can't then wait another year on anything under 1400 grams. I have had one female lay at 930 grams. She laid 3 good eggs. I never planned on the breeding as I was young and had no idea what I was doing at the time. She laid fine and is still a great breeder. I do agree that the more weight the better. What a lot of people don't always know is pairing snakes up can also help females gain more weight even if they do not lay. They will go to building mode, gain weight and never lay.... which will be better for you the next year. Just my opinion and what I have done.
Off Topic Tip: Just a little thing I do sometime when I have a picky female go off feed when I know she should be feeding.....
EX: Female at 700 grams stops feeding for 3 months and I know she is not the age to breed. I will throw a male with her for one day. Sometimes they lock, sometimes they do not. The female 9/10 times go back on feed. They never lay, but do gain tons of weight....