Just look at EDS miners , he seems to get it right for his project, the Mega Miners number is 2500 for 25 Hive each, the Mini Miners number is 100.000 for 1 Hive each. He also put the mega miners to sell first, and they sold quick and then the seconds who also sold quite quickly. You need to find the amount of Hive that you need to start the projects right away, Check Workerbees, Bees and everything else. And then see how many miners you need to sell to reach this amount. Just to compare there are only 1000 ArchonM, but 150.000 LeoMiner and and around 15000 LeoMegaminer, but also each project is different in magnitude.

You need to know how much Hive do you need, and then calculate how many miners you need to sell to finance your project. Do different simulations. How much do you need to go in Top 10 HE, for example, or Top 5? Same with Hive. Aim higher if possible. The key of succes is to underpromise and overdeliver. So people will be surprise when you do much better than estimated.

One extra question: Are you the only one taking care of everything? How do you manage risk, in case something happen to you what will happen to the project?