I sold my house last year and had an amount a bit larger than yours to invest.
I had promised myself to invest it right away, because that's what makes most sense!
And I had run this by Jim Collins, whose advise I highly value.
Of course I still had second thoughts doing it.
I logged in and out two or three times before I finally could click on that buy button.
The money was completely invested a couple of days after hitting the account.
Plunk, plunk into VTSAX...
Of course we did have a correction after that!! (Yes guys, sorry that was me).
In any case we have mostly recovered from that dip and I am happy I did what I did.
As others have mentioned, I got a couple of dividend payments in the process...
The only thing I regret is not having gone into final asset allocation yet.
My plan was to do that after I stop working.
I feel my salary is a good enough "bond replacement", so I am right below 10% in bonds right now, instead of the targeted 25%.
There were a couple of times in recent weeks where I wish I had been in final allocation already.
Now that we have recovered, whew, I'll actually start moving towards final allocation as I am getting ready to resign.
You know what makes most sense, but in the end you have to do what you have to do in order to be able to sleep
Good luck!