I have work and business and feel like going back to school again?

Ok, I drop out from college at 18 years old, by then Ive been working and now im 25yo. I have a stable work and business, while the rest of my friend still struggling with their job and business.

I have a few stores around the country and I have my own workshop for production.

Now, business are getting better, and I think I need more technique that I need to learn to make my business better and market my product overseas. thats what I think.
I was thinking to study overseas, the short course may be will be taking 3months or may be more.

But do you think its a good way for me to leave my work and just go back to school? It wont be cheap and I need to spend like 10k monthly. and I might be need to go back and forth once a month.

and worst, I have a wife who wanted to stick with me all the time. and I need to bring her abroad as well.
I know my question right now is a bit childish, please bare with me. can you give some ideas what will you do if you're in my position?

pleasee advice.

Getting more education can never hurt you negatively, it's always beneficial.