Payment for house and NISA

Hello everyone,

I have my extra saving in my NISA account (emaxis slim all country) and as I approach to buy my house, there is some money I have to pay in probably around April next year outside of my bank loan (some options, the frontyard, etc.).

I don't have enough cash saving to pay for this so looking on taking money from my NISA to pay for this. Although I have (hopefully) some bonuses coming in, I do wonder what is the best way to manage such payment in the future.

I think cash is the safest but also having around 5mil in the bank until April is not that great, right? Is it too risky to leave the money in my NISA until 2-3 months before I have to make such payment?
I understand in some catastrophe it can become zero but I also think if that scenario where to happen, we will be worring about something else.

What would you do?

by melokoton