1 - what is the minium weight for a female leo to mate successfully (yes I can google it but I dont trust just any website they are all different and I'd like to know what my friends here have to say)
These days I would say at least 50 grams since leos seem to be getting bigger than they did 10 years ago.
2 - Do the male and female only have to be introduced once for the whole season? Or should they be re-introduced after every clutch is laid?
Female leos store sperm and it's hard to say exacty how many clutches that would be good for, but from what I've read, 3 clutches is about the norm, so you could re-introduce every 3 clutches. I keep my males and females together for the whole season (Jan-Oct)
3 - I have 2 75gallon tanks - each tank has 1 male and no less than 4 females there are about 10 hides in each tank... some warm, some cool, some with moss, some with tile, some are just rock formations beneath a black light for added stomach heat. What is the maximum number of females you would put with 1 male.
I have heard of males "servicing" a large number of females. Due to my population and tank size, my max has been 1.3 and the male has done very well with them. You should be fine with 1.4
4 - (and finally) who wants to buy some eggs I have the "POTENTIAL" for 150 to 180 eggs this season HAHAHAHAHAHA
I'm assuming from your numbers that you have about 2 males and 8 females. Last summer I bred 3 males and 7 females. I generated about 70 eggs, of which 39 hatched and survived. It's good to plan for the max, but it may not happen. If you feel you will produce more babies than you can house and sell/keep/give away, you should consider breeding fewer females.
Good luck,
Aliza