IMO, using private emails like @gmail and @outlook doesn't bode well for your brand image.
For starters, most people would call it a scam right off the bat.
Some might think, if this dude's not able to invest on his own brand then how can he invest in mine?
Doing cold outreach with you brand's name positions yourself as the authentic and trustworthy brand.
As for your question, I'd say it won't work.