What Un-croppable high security chain and lock

well i got my new house, its not finished yet (and due to move before xmas i hope ) and will be 5,7,10 miles away from mabie , dalbeattie and Ae forest and other 7 stanes also . the new area i dont trust as much as where i am now as its such a bigger town (dumfries) . now i have my high secure Asgard box that takes my 3 mountain bikes  (£10k worth of bikes ) (road bike in the house) . now im going to get more locks and shackles for the outside of the bike box like 2 clasps on the 2 edges of the box holding down the roof to the man box so if they did manage to break original locks then this will take them longer to get in. if they do manage to get in this is where i want it to get interesting , i have over 10k worth of bikes and well i cant skimp out and im pretty sure my insurance will go up triple or quadruple in costs due to the size of the town . im now thinking 2 anchor points , where i will use this one  www.asgardsss.co.uk/bike-locks/bike-lock-ground-anchor

and then this one as most secure will be this one and hope they give up at this point or hace been caught by myself or the police  www.pjbsecurity.co.uk/new-untouchable-19mm-x-20m-security-chain-oxford-nemesis-padlock-disc-lock expensive i know and its more than enough to hold all bikes but at this price i want my bikes theft proof , the only way they are getting bikes is if using a grinder . am i going to far ? or shall i go for a cheaper one maybe with 16mm or 14mm chain .  could get 2x 14mm chains and 2 x anchors for same price as 19mm untouchable . or am i best getting 2 or 3 of the oxford and hope they havent got a heavy duty bolt cropper , but saying all that if they get in then they will crop the oxford locks with no bother so do i bother with the oxford or do i just go longer 2,5m chain for £209 ?

thinking of a camera also that records to my email or cloud storage but locks are a must for now  . and may as well start buying bits for the security and safety of my bikes . 


for the doors to add that extra stiffness to the doors 
www.amazon.co.uk/dp/B003JZ8N6G/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=3ATVRUN5MG8D6&coliid=I1D363ED1ZW6YA

or this

www.amazon.co.uk/dp/B00ISY27N8/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=3ATVRUN5MG8D6&coliid=I2ZSKTTSA39VPQ&psc=1


2x for the edges and to hold roof down , may have to put a bit of a bend in them to get them on the box 

www.amazon.co.uk/dp/B01BCI85UU/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=3ATVRUN5MG8D6&coliid=I2TOHUCTDT5741

2x www.amazon.co.uk/ABUS-70IB-Aquasafe-Padlock-Non-Corrosive/dp/B000P5QBZI/ref=sr_1_15?ie=UTF8&qid=1475805648&sr=8-15&keywords=padlocks

Question is am i going to far and expensive ? as it is a lot of money . but also my bikes  cost alot  also . and time consuming locking and unlocking .


any other suggestions on the 16 or 19mm uncroppable chain as thats a must if its the only thing i do get .