To disappear for a while?

Of course it wouldn't be unreasonable!
Selfish - ffs, if you can't put yourself and your son first when your husband has died when on earth can you??
Waste of husband's money - it is (presumably) your money now, not his, and you are free to do with it what you want.

I'm not sure how much it will help or not. You'll probably have more of an idea of that for yourself.

I know that for myself when late-DH died the main "thing" that "helped" was the passage of time, and much as you might want to in the moment you can't hurry that along.
I took my boys away in the UK just after the funeral for a week, although my mum also came with us.
I also took them away for a week abroad that summer, about 4 or 5 months later.

I hope you find some peace.

I’m sorry for your loss OP. 💐

I think you need to trust your instincts. It is really tough to process, it’s life-changing and a formative event for your son. How things go in this next period -the actions you take, could affect the course of the rest of your son’s life. It could be really beneficial and healing for the two of you to have a bonding time, as long as you don’t just leave your son rattling around on his own in a strange place while you stare out of the window.

3 weeks isn’t that long, is it? If you are savvy, it doesn’t need to cost the Earth. If money is really tight, there may even be a Children In Need charity or some such thing which could help you out.

I personally find nature and the outdoors very healing.

Definitely do it.
Not the same but after my husband left me ( affair) l went Greek island hopping with my 12 year old daughter for a month.
Gosh it helped.
Good luck and sorry for your loss.

As long as it would suit your son. Disappearing for the summer holidays can really have a negative effect on friendships at this age. Is he starting high school this year, or is it his second year? Because they've mentioned money, I'd ignore them.

Sorry for you loss.
I’ve not been in that situation but it sounds like a great idea to me.
Maybe consider a 2 centre holiday - somewhere busier where your son won’t get bored and somewhere where you can both enjoy the peace and relax,
That way you get the best of both worlds .
Ignore the people saying don’t do it, because as you have discovered - life’s too short .
It’s not selfish at all. Look after yourself and your son

Absolutely do it , if you want to.
Tell them to bugger off.

Sounds like a very good idea if you think it would help you and your son. Mum mum did this with me and my sisters after my dad died when we were young. For a month I think. We went abroad. Whatever gets you through x