You can only buy up to 6 mith and the Estoc wars are only at set times. Check the updates by devs in the news section for times.
Uh so this guys hitting me he is like 6mil attck so I'm 2 mil attck he is hitting me and winning but when I try to hit him it says defender to weak
How are Regulators getting 152bil in each haunting I have an idea of how but dang.. Never seen it go past even 90bil
They probably do more assassinations as it doesn't do much damage unless you have high spy stats or you are a spy.