I think this idea has prior art. It is called "a law firm".
There are many ways in which such organizations can be structured, but what you end up with is a team of people with different levels of experience, and different specialities, who are able to take on a variety of legal work. Some of that will be routine, and some of it will explode into years of complex litigation. Internal collaboration is normal, including with the aid of technology. Larger firms will have many locations and lots of people.
As a client, the fees you pay are a reflection of the market. If you would like to pay $200/hour for two people rather than $400/hour for one, then a prerequisite is that those people are willing to do it. Maybe they are and maybe they aren't. It's just like paying for any other kind of service.
In some practice areas, it's possible to offer low fees for "bulk" or "routine" work - sometimes because that's amenable to automation, such as with air passenger delay claims. Patent law may not fall into this category because it is genuinely very difficult to write a patent well. You have to know the law and the technology, and the starting point presented by the client may be far from expressing the actual patentable ideas, if any. That means we have a more high-touch process with specialized expertise. The long durations involved also make it unsuitable for a "no win, no fee" structure (that is essentially a business risk management issue, where some cases pay for the rest). As a business idea, you would have to think about how to manage all that. Maybe you can make it work.