Scarce ammo???

I am not thrilled by games like this with all the cool weapons then the game devs restrict the ammo. Takes all the fun out of it. I will be planning on buying this and turning to the trainers to get my ammo and god fix. I also hold out for "save anywheres..." I am not a multiplayer map player but would love a co-op version of up to 4 people following the original storyline. Otherwise bring it on!! Wild BIll