We already pay for inspinia here. It's great. I think the business is legit.

You just need to make a very good brand for it and be able to show people that they need it. Once they use it, they'll see that they are getting something better than the bootstraps that you can find(which is still great, but for a professional project you might need something extra).

Also, work on your pricing. Maybe sell a basic version with the option to pay for the (very expensive, hard to maintain) components separately.