What buyer self-serve is for
A wholesale ordering portal is for routine requests: signed-in buyers who already know their account, price list, and usual lines. They place or check work without waiting on a phone tree.
If that path is where time leaks, see custom software for wholesalers.
Renting a portal product vs owning the code
Renting a portal product can be right when the product already matches how your accounts buy, and you are fine living inside its limits.
Owning the code on Parcel Build means the portal fits your account rules, exceptions, and how you actually quote and promise. Flat $5,000/mo. Week one is a first working version. You keep tools that still earn their place.
Neither path is "always better." The open question is whether your buyer path is standard enough to rent, or specific enough that a custom wedge is cheaper over a year.
What belongs in v1
V1 is not a marketplace rebuild. Month one usually means login, account pricing the buyer can see, a clean place to place or confirm routine orders, and a clear path when something needs a human.
Defer fancy catalogs, full CPQ, and warehouse projects until the routine path stops leaking.
Next step
If a buyer portal that you own is what feels hardest, start a free 30-day build. Name that gap on the form. We scope a free 30-day build on that problem: first working version in week one, flat monthly after if you want to continue.