Do you have an extra 0 in there somewhere? It looks like you're asking about 30,050,000 poxbox points.
Main IS/FW bgs: paladins: likely too expensive for you ap lock: very cheap and strong, but everyone would hate you foul rite: here's example which is quite expensive, but you can easily replace anything you can't afford with any human, so I think it's best option for you Less common bgs: skeletons+armory: very cheap, but there's really nothing unique in it, so it's usually played when you are bored and out of other ideas nightbarbs+armory: better to have expensive runes, but can be played on budget
this would be a start of a ap denial bg http://poxbase.com/#!/deck/C8QCpHCw4C10CidcuPcilCwus6Zs56sps5aR1uE1yEJ the core champions are brewmasters (they equip enemy champions and are tanks), magnetic rover (magnetic pulse) and witch (wicked aura) the rest may vary as you see fit. I think that you can mix it with chopping blocks aswell if you have vengers and such. Otherwise FW meat spam works just fine.
No. There's quite a lot of different magnus BG's you can make though... For example a BG focussed on spamming spells for adaptive with Mercy & Chopping Block http://poxbase.com/#!/deck/ck-CpHCq_cw3c7+C8bckVcu-c1tchVCwTS6ZsgSlS4HSnS5aR1qeqe2y Ghoststalker for grabbing globes from your own dying champions and champions dying at end of turn because of chopping block. Bonus cast ghostly visage in BG full of magic damage champs to disable opponent beaters. Hammer strike sets AP to 0 for easy steal life if needed, or punish on magnus (normal). Champions which die to mercy should later die to Chopping block, Mercy makes mobilisation really cheap Priest of valdac for healing your own champions out of chopping block (also make sure to take +hp upgrade over cry imo because the hp of your champions matters a lot due to chopping block). I like sac dagger x1. Can be crazy deal sealer if you can life drink with a heavy damaged groble for example Might be better to replace coragh with something else though cause his spawns will die to chopping block. Other paths you can go with magnus are for example goodstuff, paralyse heavy (not necessarily FW/IS, but FW does have soul cage and a paralysing equip), paladins/consecrate the earth