B1 is very easy. So much so that there's no reason to not apply to a B1/B2 at the same time even you are just going to visit on vacation. Who knows, you might find that there will be a conference near your hotel, which you wouldn't be able to attend as a tourist.

Now, let's get some info from UCSIS:

https://www.uscis.gov/eir/visa-guide/b-1-business-visitor/un...

"+ How do I demonstrate that the purpose of my trip is to explore starting a business?"

" A written statement detailing the purpose of your visit, the activities you will participate in, and the intended duration of your stay Meeting confirmations (letters, emails, etc.) Meeting agendas/outlines/read-aheads Invitations for trade shows, conferences, meetings, etc. Evidence of acceptance into an incubator or accelerator program, including a description of the program activities and duration Evidence of the source of payment or other compensation, if any, you will be receiving while in the United States"

So, B1 seems to allow what the OP wants to do.

But then again, I'm not a lawyer. OP should get one.