Consider the time needed to get up to speed with printing, learning the idiosyncrasies of the printing process/printer, papers, profiles and custom profiles, maintenance, cleaning, finishing the prints, trimming, supplies, etc. Having the proper workspace and room is another aspect to consider. With large format printing, it's seldom as simple as just going out and buying a printer, unpacking it and plugging away at the project.
Mark gives some great advice as to color-managed workflow and that's one of the keys to the best output with the least waste and quality issues. Once you have a good foundation and practice, it starts becoming routine, easy and efficient but at the start it can overwhelm!
For me, it was a gradual process starting with a 17 inch sheet/roll printer and then making the jump to larger and larger printers. After the 24 inch printer, my last cabinets went in and when I went even larger, there was only countertops to store prints larger than 24x36 inches!
That first printer was intimidating and I didn't have everything in place at the start so my results stared hit-and-miss until I attended an ASMP presentation a couple of months after I got the thing with the late Bruce Frasier and learned the settings I needed to get the thing to work right. It's lots easier today, though!
In my experience and many others on this forum, it's seldom as easy as going out and buying a printer and having everything go perfectly out of the box, though if you are experienced, it still can be overwhelming when you get your first large format printer, especially where to put it and how to get it there.
My last printer was a "four-pallbearer" model that had to go down a flight of stair and then make a tight 90-degree bend to get in in the door. The previous 3 were much easier to move in and set-up, but still took at least two strong backs to manhandle to get them in my studio.
You may want to see if you can find someone close-by to visit and see how they work with their printer and ask them lots of questions or even finding someone to partner on this project so you don't pay to the nose by the print from a traditional lab.
For me, I enjoy printing still and though I haven't had a several-hundred print project in several years, still do smaller runs with the printer and it keeps on printing and printing.
Good luck with your project and keep us posted,