So Far I purchased 5 l3+ from eBay with psu's

cost was 750
 8% + 2% discounts

drops to 675 /5 = 135 for a miner and a psu   that is about 3500-4000 watts I have about 40000 - 4,000 = 36000

I have an m10      2300
I have a t2turbo    1700

4,000 watts more so  36,000 - 4,000 = 32,000

and 3 l3+ onhand = 2400

32,000 - 2400 = 29600 left.

setup so far is  9 l3+  say 7200 watts
1 m10                       say 2400 watts
1 t2 turbo                  say 1700 watts
3 s9i                         say 3900 watts

total of ...................... 15200 watts

I can order  more l3+
I can order more s9i

no one has offered me a good deal on l3+  I can get more on eBay at 135-150 with psu

with the  l3+ I have

I would hope to get a seller of s9i with psu