When looking to hire a company for your basement development one very important thing to consider is whether they use dedicated trades for the project.
Basically what this means is that each step of the project will be tended to by a specialist in that trade rather than having a small crew that does each of the steps themselves.
You will be left with a much better finished product when using dedicated trades. Even with talented general trades, you will find that while they might be great framers, and very good at drywall or painting, there always tends to be a few areas where they aren’t as strong.
You just can’t substitute the experience of having a full-time taper perform the taping and full-time painter doing the painting etc..
Now, all that being said, with a small in-house crew you may be able to get your project done at a slightly better price. Make you have checked references and viewed some finished projects in person to verify the quality of work if you go that route.
Then it will be up to you to weigh the costs versus the quality to make the best decision for your basement development.