[Hcb3200]

I totally agree with the guys on this one.
You know what you want it to do and what it needs to be capable of.
Like they all said start with the ground up ( you have already addressing tires)
Since its going to be a true work truck doing work stuff.
Good tires, (not splits) better than stock brakes, and a good frame to start.
Then work your weight items, springs, shocks etc.
Then drivetrain etc.
Last thing you want is this to "start" to be a work truck then have massive downtime having to work on something that cannot be bolted on later.
Example that seat might actually be last (lol)
Make a really good plan on parts, order of need and what you actually plan on doing. Then execute in order. Planned correctly it could be a working truck just without a few things that can be added easily later when funds are ready.
And down times can be short when adding something on.

but always enjoy your ride.