Depends how rich we get as a corporation; note though that the 360M you need for a 30 day timecard probably won't come from a taxable activity (market transactions aren't taxed, only ratting is) - but if it does, at 40% it's the difference between 12h ratting and 20h ratting. Sure, it's substantial, but it's not ballbreaking. In exchange, you get free and cheap ships and limitless ammo/supplies - and the more expensive skillbooks (e.g. Capital Ship Construction) and components (Capital Ship Construction array) as we get to need them . Also note that means that 240M ISK's just gone to the corp to buy POS mods, blueprints, etc. If all 6 or 7 members managed to pay 200M a month in tax (which is pretty unlikely), that gives us a basic turnover of 1.4bn ISK, *before* we go try to sell anything.
That said, I'll leave the accounts to Beo, that's his area of expertise. But as I see it that cash is anything but wasted