Should my maintenance vendors have their own portal logins?
For any vendor you use regularly, yes — it removes you as the middleman on every job. Instead of relaying a tenant's request, forwarding photos, and chasing a quote by text, the vendor sees the request directly, schedules the visit, and submits their estimate in one place, with the whole thread documented. It also keeps the licensing and insurance paperwork you should verify and re-check at renewal attached to the vendor rather than scattered across email.
The payoff is routing: map each maintenance category to a default vendor and a tenant's 'plumbing' request can go straight to your plumber automatically. Collabrio gives vendors their own portal login (one account that works across the property managers they serve), routes categorized requests to the default vendor, drops their scheduled visit onto your calendar, and keeps every photo, bid, and approval on the work order — without exposing the rest of your portfolio.