The lowest bidder thing has always upset me. Either they are delusional or they are lying. If they understand the domain, they are going to sell you a system they built for someone else. Or they think the system they build for you can be resold to someone with deeper pockets. In which case they will push and push for you not to make it too niche.
Sometimes prebuilt is exactly what you need, but only sometimes, and that’s not what you paid for.
Sometimes prebuilt is exactly what you need, but only sometimes, and that’s not what you paid for.