Rent commercial unit before selling building, or leave unrented?

[Stephen E.]

I have a two unit building with a large commercial unit on the ground floor, when rented goes for about $4,000 monthly. There's a large owners unit above it that makes great money as a legal AirBnB. Because of local laws only the top can be STR.

I've decided to sell the building and I'm wondering if I should focus on getting the downstairs rented out first, or if the building will sell for more/quicker with the commercial unit unrented. The realtor I've engaged to rent the commercial space is encouraging me to list the property and the rental simultaneously but I think if I was renting a commercial unit I might be turned off by the building being for sale.

And of course sometimes a commercial tenant makes renovations on their own dime that adds significant value to the property.

I'm kind of stuck here. Another consideration is if the property doesn't sell for what I'd like I don't want to be missing out on the rental income, which is substantial. And I'm worried the realtor won't try as hard to rent the space if they're focused on getting the building sold.

Not my first rodeo, but the situation is kind of unique. Would love to hear what people think.