liquidity on lay the draw

[Rob4]

apologies if this has been asked a thousand times. I tried a search and couldn't find anything. I've been paper trading a lay the draw method across a lot of leagues some with small liquidity in say comparison to the premiership. my question is what would be your maximum lay stake to be able to comfortably trade out at the 70 minute mark in markets with the following liquidity

1,000,000
500,000
100,000
50,000
20,000

thanks for any help