Compare three years, not the launch
A subscription looks small next to a build cost and it never stops. A custom build looks large and then mostly does not recur beyond hosting and occasional maintenance. Neither framing is dishonest, they are just different shapes. Take your realistic plan tier, multiply by thirty-six months, add the seats you will need, and compare that to a build plus three years of hosting. The result surprises people in both directions, which is the point of doing it.