In an acquisition of that business, you're going to get a very low multiple on your forward revenue. That's because, in general, you can't plug a body-shop consultancy into a bigger sales machine and amplify the profits; sales and delivery in those businesses are delicately balanced, and while they can be scaled, they can't be abruptly scaled by an acquirer.†
If you can bootstrap a product business, none of that caveat applies. You should bootstrap if you can!
† (but if your consultancy is throwing up 7 figure profits, you might not care about its sale value; just run the company for 10 years and bank the profits).