Yeah, of course I'd like you to buy a ProRock44.
The overall feasibility of the project depends on who does the work. Will you be doing all the work or paying others for it? If you're paying for the work, it makes even more sense to look at the options.
I'd look at is as if you got a free locker and axle shafts. Building it isn't a terrible idea but you have to look at what you'll have when it is done.
The first step would be to check it for straightness. Any axle that had taken a hit that would damage the lower control arm bracket that bad is likely to be tweaked. It's also possible that there is damage to the 'C's. By the end of the project you'll need new brackets, probably sleeve and gusset it, potentially some straightening, regear to your ratio and you'll still have a 44 with bad caster angles.
A better bet that won't be too much more is just going to a PR44. You won't be needing sleeves or gussets, you'll be getting new brackets, it has heavy duty 'C's and won't need work to make it straight. You'll also have your caster angles back to stock or better. You'll just need to have your lockers and gears installed and you can do the rest.
You'll spend more money but end up with a much better end product. Who knows, you may even be able to find a buyer for your 30 and 44 housing to make up some of the difference.
*Sales pitch off*