New build with recycled parts on a ridiculous budget 120cm*60cm work area

[Desertboy]

Really am going to need to fit a dedicated 32amp line to the consumer unit, checked out the vacuum cleaners I have and 1 is 2.2kw and the other 1.8kw so if I use them both at once then that's 4kw lol.

What I need is an 800w cleaner for the dust shoe I think and dig out my vac pump or buy a 2nd hand one. At work I have infinite access to lorry air tanks (Used for the air brakes, raising suspension, etc) for free was thinking I could use a couple of them as vacuum tanks to increase the capacity of the vacuum pumps. I have compressed air on tap so less point fitting them for air.

I wonder how safe the air tanks are if I draw a vacuum on them, I think it would be wise to put them in some sort of box to give some protection against failure.

Was reading if I surface the MDF 1/16th both sides then I'll remove the non porous skin and the mdf will be permeable enough to suck through without holes I'm definitely going to have to try that.